"after bright stars, the ""Regulus"" was named after Regulus, the brightest star in the constellation Leo and one of the brightest stars in the night sky. Conversion began on 29 June 1984 at National Steel and Shipbuilding in San Diego, California. Her cargo hold was redesigned into a series of decks connected by ramps so vehicles can be driven into and out of the cargo hold for fast loading and unloading. She was also fitted with two sets of two cranes; one set located at midship capable of lifting 35 tons, and another set located aft capable of lifting 50"
"M4V. The companion pair has an orbital period of about 600 years with a separation of 2.5"" in 1942. The Regulus system as a whole is the twenty-first brightest star in the night sky with an apparent magnitude of +1.35. The light output is dominated by Regulus A. Regulus B, if seen in isolation, would be a binocular object of magnitude +8.1, and its companion, Regulus C, the faintest of the three stars that has been directly observed, would require a substantial telescope to be seen, at magnitude +13.5. Regulus A is itself a spectroscopic binary: the secondary star has"
"star Regulus from Vibo Valentia, Italy. ""Rhodope""s spectral type is ambiguous. In the Tholen classification, the noisy spectrum is closest to a G-type and somewhat similar to a common C-type (GC:). In the SMASS classification, it is an Xe-subtype, that transitions from the X-type to the very bright E-type. In addition, ""Rhodope"" has also been characterized as a primitive P-type and carbonaceous C-type by the Wide-field Infrared Survey Explorer (WISE) and by Pan-STARRS photometric survey, respectively. Two well-defined rotational lightcurves of ""Rhodope"" were obtained from photometric observations by French astronomer Matthieu Conjat and by an anonymous observer of the ""Collaborative"
"with modern observations. Rho Leonis Rho Leonis (ρ Leo) is a binary star in the zodiac constellation of Leo, and, like the prominent nearby star Regulus, is near the ecliptic. With an apparent visual magnitude of 3.9, this star can be readily seen with the naked eye. Parallax measurements give a distance estimate of about from the Earth. This is an enormous star with about 21 times the Sun's mass () and 37 times the Sun's radius. Its spectrum matches a stellar classification of B1 Iab, with the 'Iab' luminosity class indicating that it is in the supergiant stage of"
"Rho Leonis Rho Leonis (ρ Leo) is a binary star in the zodiac constellation of Leo, and, like the prominent nearby star Regulus, is near the ecliptic. With an apparent visual magnitude of 3.9, this star can be readily seen with the naked eye. Parallax measurements give a distance estimate of about from the Earth. This is an enormous star with about 21 times the Sun's mass () and 37 times the Sun's radius. Its spectrum matches a stellar classification of B1 Iab, with the 'Iab' luminosity class indicating that it is in the supergiant stage of its evolution. Rho"
"photosphere at Regulus' poles is considerably hotter, and five times brighter per unit surface area, than its equatorial region. The star's surface at the equator rotates at about 320 kilometres per second (199 miles per second), or 96.5% of its critical angular velocity for break-up. It is emitting polarized light because of this. Regulus BC is 5,000 AU from Regulus A. They share a common proper motion and are thought to orbit each other. Designated Regulus B and Regulus C, the pair has Henry Draper Catalogue number HD 87884. The first is a K2V star, while the companion is approximately"
"Omicron Gruis ο Gruis, Latinised as Omicron Gruis, is a binary or triple star system in the southern constellation of Grus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.52. Based upon an annual parallax shift of 32.50 mas as seen from the Earth, the system is located 100 light years from the Sun. The pair form a close spectroscopic binary system with a physical separation of about 14.9 astronomical units. The primary component is an F-type main sequence star with a stellar classification of F4 V, a star that is currently fusing its"
"to ""Alpha Leonis"") is the star's Bayer designation. The traditional name ""Rēgulus"" is Latin for 'prince' or 'little king'. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included ""Regulus"" for this star. It is now so entered in the IAU Catalog of Star Names. Regulus is 0.47 degree from the ecliptic, the closest of the bright stars, and is regularly occulted by the Moon."
"Telescopium Herschelii Telescopium Herschelii (Latin for ""Herschel's telescope""), also formerly known as Tubus Hershelli Major, is a former constellation in the northern celestial hemisphere. Maximilian Hell established it in 1789 to honour Sir William Herschel's discovery of the planet Uranus. It fell out of use by the end of the 19th century. Psi Aurigae at apparent magnitude 4.8 was the constellation's brightest star. It was one of two constellations created by Maximilian Hell in 1789 to honour the famous English astronomer Sir William Herschel's discovery of the planet Uranus. Named ""Tubus Hershelli Major"" by Hell, it was located in the"
"Pollux (star) Pollux, also designated Beta Geminorum (β Geminorum, abbreviated Beta Gem, β Gem), is an orange-hued evolved giant star approximately 34 light-years from the Sun in the northern constellation of Gemini. It is the brightest star in the constellation of Gemini and the closest giant star to the Sun. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. In 2006, an extrasolar planet (designated Pollux b or β Geminorum b, later named Thestias) was confirmed to be orbiting it. ""β Geminorum"" (Latinised to ""Beta Geminorum"") is"
"the constellation of Sextans. It is located 4.44 million light years away from Earth. DDO 74 (also known as Leo I, Regulus Dwarf, PGC 29488 or UGC 5470) lies approximately 820,000 light years away in the constellation Leo. It is one of the most distant satellite galaxy of our Milky Way. The dwarf spheroidal galaxy is located only 12 arcminutes from Regulus (α Leonis), and the light from Regulus makes the visibility of DDO 74 becomes poor, so it is difficult to be observed. DDO 75 (also known as Sextans A, PGC 29653 or UGCA 205) is an irregular galaxy"
"constellations. Another readily identifiable constellation is Leo, above the Holy Family, with its brightest star, Regulus, in the centre of the picture. It has been proposed that Elsheimer reworked the painting in 1610, after the publication of Galileo's Sidereus Nuncius, which showed the Milky Way as composed of individual stars and showed the moon's surface in unprecedented detail. This hypothesis has been contested by Elsheimer scholar Keith Andrews. In addition to disclosing Elsheimer's interest in scientific topics, the appearance of the Milky Way has a spiritual connotation—it symbolized the path to heaven beginning in the Middle Ages. Elsheimer's sky, wrote"
"Rigel Rigel (), also designated Beta Orionis (β Orionis, abbreviated Beta Ori, β Ori), is generally the seventh-brightest star in the night sky and the brightest in the constellation of Orion—though occasionally it is outshone within the constellation by the variable star Betelgeuse. With an apparent magnitude of 0.13, it is a luminous object some 863 light-years distant from Earth. Rigel as seen from Earth is actually a multiple star system of three to five stars, the primary star (Rigel A) being a blue-white supergiant which is estimated to be anywhere from 120,000 to 279,000 times as luminous as the"
"heliacal rising of Regulus occurs in the first week of September. Every 8 years, Venus passes Regulus around the time of the star's heliacal rising, as on 5 September 2014. Regulus is a multiple star system consisting of at least four stars. Regulus A is the dominant star, with a binary companion 177"" distant that is thought to be physically related. Regulus D is a 12th magnitude companion at 212"", but is apparently an unrelated background object. Regulus A is a binary star consisting of a blue-white main sequence star of spectral type B7V, which is orbited by a star"
"is the third-brightest star in the constellation Cygnus, is actually a close binary itself. Also in the Cygnus constellation is Cygnus X-1, an X-ray source considered to be a black hole. It is a high-mass X-ray binary, with the optical counterpart being a variable star. Sirius is another binary and the brightest star in the night time sky, with a visual apparent magnitude of −1.46. It is located in the constellation Canis Major. In 1844 Friedrich Bessel deduced that Sirius was a binary. In 1862 Alvan Graham Clark discovered the companion (Sirius B; the visible star is Sirius A). In"
"Alpha Hydri Alpha Hydri (α Hyi, α Hydri) is the second brightest star in the southern circumpolar constellation of Hydrus. It is readily visible to the naked eye with an apparent visual magnitude of +2.9. It is sometimes informally known as the Head of Hydrus. This should not be confused with Alpha Hydrae (Alphard) in the constellation Hydra. Alpha Hydri is one of only three stars in the constellation Hydrus that are above the fourth visual magnitude. This star can be readily located as it lies to the south and west of the prominent star Achernar in the constellation Eridanus."
"of the cluster. NGC 1545 NGC 1545 is an open cluster in the constellation Perseus. It was discovered by William Herschel on December 28, 1790. It is located in the north-eastern part of the constellation, a few arcminutes east of the 4.5 magnitude star b Persei, near the equally large and bright NGC 1528 (m = 6.4), which is less than 1.5° towards the northwest. However, it is less dense and rich. The brightest star of the cluster is a K5 III giant star, with 7.1 magnitude, but its membership is questionable. One more 7.9 magnitude star is visible at"
"NGC 3918 NGC 3918 is a bright planetary nebula in the constellation Centaurus, nicknamed the ""Blue Planetary"" or ""The Southerner"". It is the brightest of the far southern planetary nebulae. This nebula was discovered by Sir John Herschel in March 1834, and is easily visible through small telescopes. The round or even slightly oval diameter is telescopically between 8 and 10 arcsec, though deep images extends this to about 19 or 20 arcsec. More surprising is the beautiful rich blue colour that looks much like the coloured images of Neptune taken by Voyager 2 in 1989. Spectroscopy reveals NGC 3918"
"NGC 1545 NGC 1545 is an open cluster in the constellation Perseus. It was discovered by William Herschel on December 28, 1790. It is located in the north-eastern part of the constellation, a few arcminutes east of the 4.5 magnitude star b Persei, near the equally large and bright NGC 1528 (m = 6.4), which is less than 1.5° towards the northwest. However, it is less dense and rich. The brightest star of the cluster is a K5 III giant star, with 7.1 magnitude, but its membership is questionable. One more 7.9 magnitude star is visible at the north edge"
"British observers, for example, the first magnitude stars Capella (declination +45° 59') and Deneb (+45° 16') do not set from anywhere in the country. Vega (+38° 47') is technically circumpolar north of latitude +51° 13' (just south of London); taking atmospheric refraction into account, it will probably only be seen to set at sea level from Cornwall and the Scilly Isles. Some stars within the far southern constellations (such as Crux, Musca, and Hydrus) roughly south of the Tropic of Capricorn (-23½°) will also be circumpolar stars. Stars (and constellations) that are circumpolar in one hemisphere are always invisible in"
"(see ""The Stars My Destination"" by Alfred Bester, Demon Princes by Jack Vance, and Star Trek below). Rigel is the brightest star in the constellation Orion and the sixth brightest star in the sky, with an apparent magnitude of 0.18. Although it has the Bayer designation ""Beta,"" it is almost always brighter than Alpha Orionis (Betelgeuse). Whereas the latter star represents the right shoulder of the Hunter, Rigel represents his left foot. It is the first star counterclockwise from Sirius in the Winter Hexagon, and is followed in turn by Aldebaran. The star's name is a contraction of ""Riǧl Ǧawza"
"projected rotational velocity of 194 km/s. Omicron Herculis is both a spectroscopic and an interferometric binary star with a separation of 0.1 arcsec. Omicron Hercules is notable for residing close to the coordinates of the solar apex, the direction towards which the Sun is moving. This was first noticed by William Herschel in 1783, although in his first calculation he identified this point with Lambda Herculis. It will eventually become the brightest star in the sky in approximately 3 million years from today, at -0.4, slightly less bright than Canopus today. Omicron Herculis Omicron Herculis, Latinized from o Herculis, is"
"Crater class cargo ship named after the star. \end{align}</math></ref> Lambda Draconis Lambda Draconis (λ Draconis, abbreviated Lam Dra, λ Dra), also named Giausar, is a solitary, orange-red star in the northern circumpolar constellation of Draco. It is visible to the naked eye with an apparent visual magnitude of +3.85. Based upon an annual parallax shift of 9.79 mas as seen from the Earth, the star is located around 333 light years from the Sun. This is an evolved red giant star on the asymptotic giant branch with a stellar classification of M0III-IIIa Ca1. It is a suspected slow irregular variable"
"Omicron Draconis Omicron Draconis (Latinised as ο Draconis, abbreviated to ο Dra) is a giant star in the constellation Draco located 322.93 light years from the Earth. It has a radius of 30 solar radii, and a luminosity of 269 suns. Its path in the night sky is circumpolar above the ecliptic, meaning the star never rises or sets when viewed in the night sky from certain positions in the northern hemisphere. Omicron Draconis can be considered the north pole star of Mercury, as it is the closest star to Mercury's north celestial pole. This is a single-lined spectroscopic binary"
"star in Aquarius). Aldebaran marked the vernal equinox and Antares marked the autumnal equinox, while Regulus marked the Summer Solstice and Fomalhaut the Winter Solstice. While watching the sky, the dominant star would appear in its season, each having a time of the year when most noticeable. Regulus was seen as the main star because it was in the constellation of Leo, giving it the power of the lion, signifying the strength of kings with large implications. The constellations of the Royal Stars were said to be fixed because their positions were close to the four fixed points of the"
"took some of the finest stars from Argo Navis. Its brightest star was Beta Carinae (β Car) or Miaplacidus, which was known as α Roburis or α Roburis Carolii. Robur Carolinum Robur Carolinum (Latin for ""Charles' oak"") was a constellation created by the English astronomer Edmond Halley in 1679. The name refers to the Royal Oak where Charles II was said to have hidden from the troops of Oliver Cromwell after the Battle of Worcester. It was between the constellations of Centaurus and Carina, extending into half of Vela. Robur Carolinum as a constellation never gained popularity, probably because it"
"Most of the Western names of stars, such as Algol or Betelgeuse, are Arabic in origin. In 1603 the Augsburg lawyer-uranographer Johann Bayer introduced the current classificatory system for the brighter stars, in which stars are identified as belonging to their constellations by Greek letters, in (roughly) descending order of brightness; so that Regulus, brightest star in Leo, is called ""α Leonis"", the brightest star of the Lion. Unpredictable observations in the heavens, including novas and supernovas as well as other phenomena in the heavens such as comets, meteors, parhelions, and even rainbows, were all collected under the name of"
"NGC 3195 NGC 3195 is a planetary nebula located in the constellation Chamaeleon. It is the most southern of all the bright sizable planetary nebula in the sky, and remains invisible to all northern observers. Discovered by Sir John Herschel in 1835, this 11.6 apparent magnitude planetary nebula is slightly oval in shape, with dimensions of 40×35 arc seconds, and can be seen visually in telescopic apertures of at low magnifications. Spectroscopy reveals that NGC 3195 is approaching Earth at , while the nebulosity is expanding at around . The central star is listed as >15.3V or 16.1B magnitude. Distance"
"Betelgeuse. Rigel has a color index (B–V) of −0.03, meaning it appears white or slightly blue-white. Culminating at midnight on 12 December, and at 9 pm on 24 January, Rigel is most visible in winter evenings in the northern hemisphere and summer in the southern. In the southern hemisphere, Rigel is the first bright star of Orion visible as the constellation rises. In stellar navigation, Rigel is one of the most important navigation stars, since it is bright, easily located and equatorial, which means it is visible all around the world's oceans (the exception, areas within 8° of the North"
"of names approved by the WGSN; which included ""Arcturus"" for this star. It is now so entered in the IAU Catalog of Star Names. With an apparent visual magnitude of −0.05, Arcturus is the brightest star in the northern celestial hemisphere and the fourth-brightest star in the night sky, after Sirius (−1.46 apparent magnitude), Canopus (−0.72) and Alpha Centauri AB (−0.27). However, Alpha Centauri AB is a binary star, whose unresolved components to the naked eye are both fainter than Arcturus. This makes Arcturus the third-brightest individual star, just ahead of Alpha Centauri A, whose apparent magnitude is −0.01. The"
"Beta Herculis Beta Herculis (β Herculis, abbreviated Beta Her, β Her), also named Kornephoros, is a binary star and the brightest star in the northern constellation of Hercules at a base apparent visual magnitude of 2.81. This is a suspected variable star with an apparent magnitude that may rise as high as 2.76. Based upon parallax measurements, it is located at a distance of from the Sun. Although Beta Herculis appears to the naked eye to be a single star, in July 1899 the American astronomer W. W. Campbell discovered from spectroscopic measurements that its radial velocity varies, and concluded"
"proper motion and small trigonometric parallax as measured by Hipparcos. This suggests that it is a background star unrelated to Scorpius-Centaurus. Omicron Scorpii Omicron Scorpii (ο Sco, ο Scorpii) is a star in the zodiac constellation of Scorpius. With an apparent visual magnitude of +4.57, it is visible to the naked eye. Parallax measurements indicate a distance of roughly 900 light years. It is located in the proximity of the Rho Ophiuchi dark cloud. This is a white A-type bright giant with a stellar classification of A4II/III. It is one of the brighter members of this rare class of stars,"
"Gamma Hydri γ Hydri, Latinised as Gamma Hydri, is a solitary, red-hued star in the constellation Hydrus. It has an apparent visual magnitude of 3.26, making it easily visible to the naked eye at night. Based upon an annual parallax shift of 15.24 mas as measured from Earth, the system is located about 214 light years from the Sun. This is an evolved red giant star with a stellar classification of M1 III, and is most like on the asymptotic giant branch of the HR diagram. It is a semiregular variable that pulsates between magnitudes 3.26 and 3.33, although its"