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Beta Serpentis, Latinized from β Serpentis, is a binary star[3] system in the constellation Serpens, in its head (Serpens Caput). It is visible to the naked eye with a combined apparent visual magnitude of +3.65.[2] Based upon an annual parallax shift of 21.03 mas as seen from Earth,[1] it is located around 155 light years from the Sun. The system is a member of the Ursa Major Moving Group.[7] Components[edit] The visual magnitude +3.68 primary, component A, is either an ordinary A-type main-sequence star or somewhat evolved subgiant with a stellar classification of A2 V[4] or A2 IV,[5] respectively. The star is about 267 million years old with nearly double the mass of the Sun.[8] It is spinning rapidly with a projected rotational velocity of 207 km/s.[4] The secondary component, visual magnitude 9.7 B, lies at an angular separation of 30.6 arc seconds. It is a main-sequence star with a class of K3 V.[3] There is a magnitude +10.98 visual companion, designated component C, located 202 arcseconds away.[10] Nomenclature[edit] It was a member of indigenous Arabic asterism al-Nasaq al-Sha'āmī, "the Northern Line" of al-Nasaqān "the Two Lines",[11] along with β Her (Kornephoros), γ Her (Hejian, Ho Keen) and γ Ser (Zheng, Ching).[12] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, al-Nasaq al-Sha'āmī or Nasak Shamiya were the title for three stars :β Ser as Nasak Shamiya I, γ Ser as Nasak Shamiya II, γ Her as Nasak Shamiya III (exclude β Her).[13] In Chinese, 天市右垣 (Tiān Shì Yòu Yuán), meaning Right Wall of Heavenly Market Enclosure, refers to an asterism which is represent eleven old states in China which is marking the right borderline of the enclosure, consisting of β Serpentis, β Herculis, γ Herculis, κ Herculis, γ Serpentis, δ Serpentis, α Serpentis, ε Serpentis, δ Ophiuchi, ε Ophiuchi and ζ Ophiuchi.[14] Consequently, β Serpentis itself is known as 天市右垣五 (Tiān Shì Yòu Yuán wu, English: the Fifth Star of Right Wall of Heavenly Market Enclosure), represent Zhou (周) (possibly Chow, the dynasty in China),[15][16][17] together with η Capricorni and 21 Capricorni in Twelve States (asterism).[18] References[edit]

^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.  ^ a b c Lutz, T. E.; Lutz, J. H. (June 1977), "Spectral classification and UBV photometry of bright visual double stars", Astronomical Journal, 82: 431–434, Bibcode:1977AJ.....82..431L, doi:10.1086/112066.  ^ a b c d Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878 , Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.  ^ a b c d e Jones, Jeremy; et al. (November 2015), "The Ages of A-Stars. I. Interferometric Observations and Age Estimates for Stars in the Ursa Major Moving Group", The Astrophysical Journal, 813 (1): 18, arXiv:1508.05643 , Bibcode:2015ApJ...813...58J, doi:10.1088/0004-637X/813/1/58, 58.  ^ a b Gray, R. O.; Garrison, R. F. (December 1987), "The Early A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation", Astrophysical Journal Supplement, 65: 581, Bibcode:1987ApJS...65..581G, doi:10.1086/191237.  ^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053 , Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.  ^ a b King, Jeremy R.; et al. (April 2003), "Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group", The Astronomical Journal, 125 (4): 1980–2017, Bibcode:2003AJ....125.1980K, doi:10.1086/368241.  ^ a b c d e David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154 , Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146.  ^ "bet Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-22.  ^ Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920  ^ Kunitzsch, P.; Smart, T. (2006), A Dictionary of Modern Star names: A Short Guide to 254 Star names and Their Derivations (Second Revised ed.), Cambridge, MA: Sky Publishing, p. 31, ISBN 1-931559-44-9.  ^ Allen, R. H. (1963) [1899], "Hercules", Star Names: Their Lore and Meaning (Dover ed.), New York, NY: Dover Publications Inc, p. 243, ISBN 0-486-21079-0, retrieved 2017-09-22.  ^ Rhoads, Jack W. (November 15, 1971), Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars (PDF), California Institute of Technology: Jet Propulsion Laboratory.  ^ (in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7. ^ Allen, R. H. (1963) [1899], "Serpens", Star Names: Their Lore and Meaning (Dover ed.), New York, NY: Dover Publications Inc, p. 376, ISBN 0-486-21079-0, retrieved 2017-09-22.  ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 24 日 ^ (in Chinese) English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name Archived 2010-08-10 at the Wayback Machine., Hong Kong Space Museum. Accessed on line November 23, 2010. ^ Allen, R. H. (1963) [1899], "Capricornus", Star Names: Their Lore and Meaning (Dover ed.), New York, NY: Dover Publications Inc, p. 142, ISBN 0-486-21079-0, retrieved 2017-09-22. 

v t e

Serpens constellation

Stars (list)

Bayer

α (Unukalhai) β (Chow) γ δ ε ζ η θ (Alya) ι κ λ μ ν ξ ο π ρ σ τ1 τ2 τ3 τ4 τ5 τ6 τ7 τ8 υ φ χ ψ ω

Flamsteed

3 4 5 6 7 8 10 11 (A1) 14 16 25 (A2) 29 36 (b) 39 40 43 45 46 47 59 (d) 60 (c) 61 64 3 Her

Variable

R W X RT UZ VV VY WX AA AN AO AP AR AU BQ CT CV CW EG FH FI FK FL FQ FR LV LW LX MR MS MT MV MY NN NO NQ NW OO OU PS QV QX QY V382 V411

HR

5665 5690 5692 5706 5711 5740 5745 5783 5796 5831 5850 5859 5861 5874 5909 5913 5931 5992 6005 6011 6014 6016 6449 6496 6544 6562 6568 6600 6620 6666 6681 6755 6756 6757 6785 6830 6840 6843 6858 6890 6898 6928 6993 (e) 6999 7008 7048 7076 7144

HD

135061 135615 136027 136118 138085 142245 143436 145936 146740 157969 168112 168443 168746 175541

Gliese

Gliese 701 Gliese 710 GJ 1224

Other

ADS 9544 AS 296 COROT-9 COROT-11 COROT-23 GX 17+2 IRAS 18418-0440 MWC 297 MWC 922 PG 1510+234 PG 1605+072 PSR B1534+11 PSR J1719-1438 Serpens FIRS 1 Serpens SVS 20 Serpens X-1

Star clusters

Association

Serpens OB2

Open

IC 4756 Messier 16 NGC 6604 NGC 6605 Serpens South

Globular

Messier 5 NGC 6535 NGC 6539 Palomar 5

Molecular clouds

Serpens cloud

Nebulae

Dark

L134 L183 L483

H II

Eagle Nebula Sh2-54 Westerhout 40

Planetary

Abell 41 Red Square Nebula S68

Galaxies

NGC

5887 5910 5911 5913 5919 5920 5921 5926 5928 5931 5936 5937 5940 5942 5941 5944 5951 5953 5954 5952 5956 5955 5957 5960 5962 5964 5970 5972 5975 5977 5980 5983 5984 5988 5991 5990 5994 5996 5997 6003 6004 6008 6006 6007 6009 6012 6010 6014 6020 6017 6018 6021 6022 6023 6027 6027a 6027b 6027c 6027d 6027e 6029 6033 6037 6036 6051 6063 6065 6066 6070 6080 6100 6118 6172

Other

Arp 72 Arp 220 3C 317 3C 318 3C 321 3C 323.1 3C 324 3C 326 4C 11.50 Hoag's Object IRAS 15107+0724 NRAO 530 PDS 456 PG 1553+113 PKS 1546+027

Galaxy clusters

Abell 2040 Abell 2052 Abell 2063 Abell 2107 AWM 4 MKW 3s Seyfert's Sextet

Other

GRB 970111 GRB 050813 GRB 060418 GR

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