Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. Their estimated age is 370 million years. the following (all times relative to the local timezone Europe/London): The image below is a photograph of ρ Geminorum from the Digitized Sky Survey 2 (DSS2 - see The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. moving towards the Sun at the speed of The most recent measurement lists a separation of 3.4 arcseconds, corresponding to a separation perpendicular to the line of sight of approximately 85 AU. It has been known to produce widely incorrect figures. Castor C is the faintest of the three visual components. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. It is therefore possible that the two background stars are bound, but it is not certain. Rho Geminorum (ρ Gem) is a star system that lies approximately 59 light-years away in the constellation of Gemini, about 5 arcminutes east of Castor. The star is moving 193.29 ± 0.15 milliarcseconds/year towards the north and 159.09 ± 0.24 milliarcseconds/year east if we saw them in the horizon. Though there are some sources indicating that the star is a spectroscopic binary, including the Washington Double Star Catalog (WDS) and the Gliese Catalogue of Nearby Stars, no orbit has been provided. It is composed of three binary pairs designated Castor A, Castor B and Castor C. The Castor sextet has a combined apparent magnitude of 1.58 and is listed as the 23rd brightest star in the sky. To search this site, type your search word(s) in the The stars have projected rotational velocities of 18 km/s (Castor Aa) and 33 km/s (Castor Ba). [12] The star is also known to be a BY Draconis variable with a period of 11.63 days, caused by varying brightness as starspots move across the stellar surface across its rotation period. This name was translated into Latin as Prima Brachii, “the first in the paw.”. The position of this star relative to the primary has remained consistent over decades, indicating that it has a common proper motion and is therefore a wide tertiary component. The Chinese named Pollux the Third Star of North River – which is an asterism formed by Pollux, Castor and Rho Geminorum. The star known as Eta Geminorum, which is next to the Well is called Yue and represents a battle axe used for decapitating the corrupt and immoral. Rho Geminorum estimated radius has been calculated as being 1.68 times bigger than the Sun. Based on the spectral type (F0V...) of the star, the star's colour is yellow to white . Rho Geminorum has an apparent magnitude of 4.16 which is how bright we see the star from Earth. It is a medium-sized constellation that fills an area of 514 square degrees. When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. can be barely visible, or not visible at all, from skyes affected by light pollution. Acamar Achernar Acrux Adhara Albireo Alcor Alcyone Aldebaran Alderamin Algenib Algol Alhena Alioth Alkaid Almach Alnair Alnilam Alnitak Alpha Centauri Alphard Alphecca Alpheratz Altair Aludra Ankaa Anser Antares Arcturus Ascella Asterope Atlas Atria Avior Baten Kaitos Bellatrix Betelgeuse Bharani Canopus Capella Caph Castor Celaeno Deneb Denebola Diphda Dubhe Electra Elnath Eltanin Enif Fomalhaut Gacrux Gamma Cassiopeiae Ginan Hadar Hamal Imai Izar Kaus Australis Kaus Borealis Kaus Media Maia Marfik Markab Megrez Meissa Menkalinan Menkar Menkent Merak Merope Mesarthim Miaplacidus Mimosa Mintaka Mira Mirach Mirfak Mirzam Mizar Mu Cephei Naos Nunki Peacock Phecda Pleione Polaris Pollux Procyon Proxima Centauri Rasalhague Regulus Rho Ophiuchi Rigel Rigil Kentaurus Ruchbah Sabik Sadr Saiph Sargas Scheat Schedar Segin Seginus Shaula Sheratan Sirius Spica Stephenson 2-18 Suhail Taygeta Thuban Toliman Unukalhai UY Scuti Vega VV Cephei VX Sagittarii Wezen WOH G64 Zeta Reticuli Zubenelgenubi Zubeneschamali, Castor, Alpha Geminorum, α Gem, 66 Geminorum, HIP 36850, FK5 287, GJ 278, SAO 60198, Castor A, Alpha Geminorum A, α Gem A, HD 60179, HR 2891, PLX 1785.00, BD+32°1581A, GCRV 5042, TYC 2457-2407-1, Castor B, Alpha Geminorum B, α Gem B, HD 60178, HR 2890, BD+32°1581B, GCRV 5043, TYC 2457-2407-2, Castor C, Alpha Geminorum C, α Gem C, YY Geminorum, BD +32° 1582, GC 10121, GCRV 5044, HD 60179C, LTT 12039, 2MASS J07343745+3152102, PPM 72940, SAO 60199, TYC 2453-1918-1, Gaia DR2 892348454394856064. information about the ρ Geminorum double sysyem: Your guide to the Solar System and the night sky. La componente principal del sistema, Rho Geminorum A (GJ 274 A), ye una estrella blancu-mariella de la secuencia principal blanca de tipu espectral F0V. The table below Pollux is a K0IIIb class orange star, an orange giant. They are also known as the Dioscuri, Tyndarids, Tyndaridae, Castores and Gemini. The figure is derived at by using the formula from SDSS rather than peer reviewed papers. The star's Galacto-Centric Distance is 7,417.00 Parsecs or 24,191.54 Light Years. The location of the main sequence star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. In a study published in 1999, Barrado y Navascues estimated an age of 200 ± 100 million years for the group and presented a list of 16 members, including Vega, Fomalhaut, Alderamin and Zubenelgenubi. Rho Geminorum (ρ Geminorum / 62 Geminorum / HD 58946 / HR 2852) ye un sistema estelar na constelación de Xéminis de magnitú aparente +4,16. System Rho Geminorum in Elite: Dangerous - Make the most profit from here! The figure of 5.86 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012. The number of A.U. The existence of the group was originally proposed by J. P. Anosova, and V. V. Orlov in 1990, who included Castor and Fomalhaut in the group. The value comes from the Hipparcos Extended Catalog. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever. Castor Aa has 2.76 solar masses and a radius 2.4 times that of the Sun. Castor A and Castor B, image: 1CM69, licensed under CC BY-NC-ND 2.0. The English astronomer James Pound was the first to note Castor as a double star, in 1718. There's no register feature and no need to give an email address if you don't need to. 37 Geminorum (Gem) is a yellow-orange main sequence dwarf star of spectral and luminosity type G0 V. A little bigger and brighter than Sol, the star may have 1.1 times Sol's mass, 1.03 times its diameter (Johnson and Wright, 1983, page 661), and 1.25 times its luminosity. Castor and Pollux constituted the Great Twins, or Mas-tab-ba-gal-gal. 3.35), Wasat (Delta Gem, mag 3.53), and Kappa Geminorum (mag. Castor lies at an approximate distance of 51 light years from Earth. The system consists of a primary bright enough to be seen with the naked eye, a faint secondary which has rarely been observed even professionally, and a distant, somewhat bright tertiary which requires telescopic equipment for observation. In 2007, Hipparcos data was revised with a new parallax of 55.41000 which put Rho Geminorum at a distance of 58.86 light years or 18.05 parsecs. The spectral type listed in SIMBAD is M5, though this is without a source; Plotting the star's absolute magnitude on the Hertzsprung-Russell diagram (see left) indicates a B-V of 1.53, a value closer to that of an M3V star. Messier Album | The Solar System | The Constellations | Celestial Objects Castor A and Castor B have a period of 445 years and Castor AB and Castor C complete an orbit every 14,000 years. NGC 2371-2 is a planetary nebula that resembles a piece of wrapped Halloween candy. The average separation between Castor A and Castor B is 100 astronomical units. Space Exploration | Space Games | Space Gallery | Space Links, Visit Us on Facebook | Follow Us on Twitter. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 1.63. It ranks 30th in size among the 88 constellations in the night sky. The red arrow shows the motion of ρ Geminorum during the next. 1.9), Tejat (Mu Gem, mag. The binary star system has a combined apparent magnitude of 2.97, which makes it a full magnitude fainter than Castor A. The brightest star in the constellation is normally given the Alpha designation, there are exceptions such as Pollux which is Beta Geminorum. Rho Geminorum (Rho Gem) is the Bayer Classification for the star. The Winter Triangle and the Winter Hexagon, image: Wikisky, Another way to find Castor and Pollux is to drawn an imaginary line from Rigel at Orion’s foot through Betelgeuse at the shoulder and follow the line to two stars that appear similar in brightness and lie relatively close to each other. Mach 1 is the speed of sound, Mach 2 is twice the speed of sound. Rho Geminorum (62 Geminorum) é uma estrela na direção da constelação de Gemini.Possui uma ascensão reta de 07h 29m 06.61s e uma declinação de +31° 47′ 02.7″. It can be seen at latitudes between 90 degrees and -60 degrees. ρ Geminorum visual magnitude is 4.18. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. However, in a paper published in 2013, a team led by Eric E. Mamajek argued that the stars, or at least the well-known members, including Castor, did not share a common origin because the velocity differences between them were too large and the stars were even more separated 10 million years ago than they are now. The constellation Gemini, the twins, is visible in the northern hemisphere from November through April. They took part in the Calydonian Boar hunt alongside Atalanta, Theseus, Laertes, Peleus, Telamon, Jason, and many other heroes, and later joined Jason and the Argonauts on the quest for the Golden Fleece. is from Simbad, the Hipparcos data library based at the University at Strasbourg, France. The Bayer Classification was created by Johann Bayer in 1603. Castor's father was a king of Sparta called Tyndareus, while the father of Pollux was Zeus himself.
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