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13 Delphini

January 27, 2023

13 Delphini is a binary star[2] in the equatorial constellation Delphinus, with a combined apparent magnitude of 5.64.[12] The system is located at a distance of 471 light years but is approaching the Solar System with a heliocentric radial velocity of about −7 km/s.[6]

13 Delphini
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Delphinus
A
Right ascension 20h 47m 48.3330s[1]
Declination +06° 00′ 29.551″[1]
Apparent magnitude (V) 5.66[2]
B
Right ascension 20h 47m 48.3012s[1]
Declination +06° 00′ 28.127″[1]
Apparent magnitude (V) 8.51[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type A0 V[4]
U−B color index −0.09[5]
B−V color index −0.01[5]
Astrometry
Radial velocity (Rv)−7±4.3[6] km/s
Absolute magnitude (MV)−0.01[7]
A
Proper motion (μ) RA: +8.255 mas/yr[1]
Dec.: −13.162 mas/yr[1]
Parallax (π)6.9265 ± 0.0489 mas[1]
Distance471 ± 3 ly
(144 ± 1 pc)
B
Proper motion (μ) RA: +5.663 mas/yr[8]
Dec.: −12.280 mas/yr[8]
Parallax (π)6.6697 ± 0.0989 mas[8]
Distance489 ± 7 ly
(150 ± 2 pc)
Details
Mass2.51+0.31
−0.36[9] M☉
Radius3.7±0.4[9] R☉
Luminosity119+20
−17[3] L☉
Surface gravity (log g)3.69+0.61
−0.69[9] cgs
Temperature9,840+91
−90[3] K
Metallicity [Fe/H]0.00[10] dex
Rotational velocity (v sin i)170[11] km/s
Age307[10] Myr
Other designations
13 Del, 18 G. Delphini, AG+05°3035, BD+05°4613, GC 28986, HD 198069, HIP 102633, HR 7953, SAO 126222, WDS J20478+0600A
Database references
SIMBADdata

13 Delphini A has an apparent magnitude of 5.66, while its companion has an apparent magnitude of 8.51.[2] As of 2016, the pair have a separation of 1.5″ located at a position angle of 200°.[13]

13 Delphini has a blended stellar classification of A0 V,[4] indicating that it is an ordinary A-type main-sequence star. However, when the components are analysed individually, the primary star is given a class of B9V.[14] It has 2.51 times the mass of the Sun[9] and has an effective temperature of 9,840 K.[3] However, the star is large for its class, having a radius almost 4 times that of the Sun[9] and a luminosity 119 times greater.[3] This is due to 13 Delphini having completed 86.1% of its main sequence lifetime[3] and has led one source to classify it as a subgiant instead.[15] It spins rapidly with a projected rotational velocity of 170 km/s[11] and has an age of 307 million years.[10]

References

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ a b c d Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
  3. ^ a b c d e f Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. S2CID 55586789.
  4. ^ a b Paunzen, E.; Duffee, B.; Heiter, U.; Kuschnig, R.; Weiss, W. W. (July 2001). "A spectroscopic survey for λ Bootis stars". Astronomy & Astrophysics. EDP Sciences. 373 (2): 625–632. Bibcode:2001A&A...373..625P. doi:10.1051/0004-6361:20010630. ISSN 0004-6361.
  5. ^ a b Cousins, A. W. J. (1971). "Photometric standard stars". Royal Observatory Annals. 7: 86. Bibcode:1971ROAn....7.....C.
  6. ^ a b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
  7. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737.
  8. ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  9. ^ a b c d e Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.
  10. ^ a b c Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. ISSN 0320-0108.
  11. ^ a b Royer, F.; Zorec, J.; Gómez, A. E. (23 November 2006). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 463 (2): 671–682. arXiv:astro-ph/0610785. Bibcode:2007A&A...463..671R. doi:10.1051/0004-6361:20065224. eISSN 1432-0746. ISSN 0004-6361.
  12. ^ Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002-03-01). "The Tycho double star catalogue". Astronomy and Astrophysics. 384: 180–189. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822. ISSN 0004-6361.
  13. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.
  14. ^ Palmer, D. R.; Walker, E. N.; Jones, D. H. P.; Wallis, R. E. (1968). "The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars". Royal Greenwich Observatory Bulletins. 135: 385. Bibcode:1968RGOB..135..385P.
  15. ^ Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182. ISSN 0067-0049.

January 27, 2023
delphini, binary, star, equatorial, constellation, delphinus, with, combined, apparent, magnitude, system, located, distance, light, years, approaching, solar, system, with, heliocentric, radial, velocity, about, observation, dataepoch, j2000, equinox, j2000, . 13 Delphini is a binary star 2 in the equatorial constellation Delphinus with a combined apparent magnitude of 5 64 12 The system is located at a distance of 471 light years but is approaching the Solar System with a heliocentric radial velocity of about 7 km s 6 13 Delphini Observation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation DelphinusARight ascension 20h 47m 48 3330s 1 Declination 06 00 29 551 1 Apparent magnitude V 5 66 2 BRight ascension 20h 47m 48 3012s 1 Declination 06 00 28 127 1 Apparent magnitude V 8 51 2 CharacteristicsEvolutionary stage main sequence 3 Spectral type A0 V 4 U B color index 0 09 5 B V color index 0 01 5 AstrometryRadial velocity Rv 7 4 3 6 km sAbsolute magnitude MV 0 01 7 AProper motion m RA 8 255 mas yr 1 Dec 13 162 mas yr 1 Parallax p 6 9265 0 0489 mas 1 Distance471 3 ly 144 1 pc BProper motion m RA 5 663 mas yr 8 Dec 12 280 mas yr 8 Parallax p 6 6697 0 0989 mas 8 Distance489 7 ly 150 2 pc DetailsMass2 51 0 31 0 36 9 M Radius3 7 0 4 9 R Luminosity119 20 17 3 L Surface gravity log g 3 69 0 61 0 69 9 cgsTemperature9 840 91 90 3 KMetallicity Fe H 0 00 10 dexRotational velocity v sin i 170 11 km sAge307 10 MyrOther designations13 Del 18 G Delphini AG 05 3035 BD 05 4613 GC 28986 HD 198069 HIP 102633 HR 7953 SAO 126222 WDS J20478 0600ADatabase referencesSIMBADdata13 Delphini A has an apparent magnitude of 5 66 while its companion has an apparent magnitude of 8 51 2 As of 2016 the pair have a separation of 1 5 located at a position angle of 200 13 13 Delphini has a blended stellar classification of A0 V 4 indicating that it is an ordinary A type main sequence star However when the components are analysed individually the primary star is given a class of B9V 14 It has 2 51 times the mass of the Sun 9 and has an effective temperature of 9 840 K 3 However the star is large for its class having a radius almost 4 times that of the Sun 9 and a luminosity 119 times greater 3 This is due to 13 Delphini having completed 86 1 of its main sequence lifetime 3 and has led one source to classify it as a subgiant instead 15 It spins rapidly with a projected rotational velocity of 170 km s 11 and has an age of 307 million years 10 References Edit a b c d e f Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR a b c d Eggleton P P Tokovinin A A September 2008 A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869 879 arXiv 0806 2878 Bibcode 2008MNRAS 389 869E doi 10 1111 j 1365 2966 2008 13596 x S2CID 14878976 a b c d e f Zorec J Royer F January 2012 Rotational velocities of A type stars IV Evolution of rotational velocities Astronomy and Astrophysics 537 A120 arXiv 1201 2052 Bibcode 2012A amp A 537A 120Z doi 10 1051 0004 6361 201117691 ISSN 0004 6361 S2CID 55586789 a b Paunzen E Duffee B Heiter U Kuschnig R Weiss W W July 2001 A spectroscopic survey for l Bootis stars Astronomy amp Astrophysics EDP Sciences 373 2 625 632 Bibcode 2001A amp A 373 625P doi 10 1051 0004 6361 20010630 ISSN 0004 6361 a b Cousins A W J 1971 Photometric standard stars Royal Observatory Annals 7 86 Bibcode 1971ROAn 7 C a b Gontcharov G A November 2006 Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system Astronomy Letters 32 11 759 771 arXiv 1606 08053 Bibcode 2006AstL 32 759G doi 10 1134 S1063773706110065 ISSN 1063 7737 S2CID 119231169 Anderson E Francis Ch May 2012 XHIP An extended hipparcos compilation Astronomy Letters 38 5 331 346 arXiv 1108 4971 Bibcode 2012AstL 38 331A doi 10 1134 S1063773712050015 ISSN 1063 7737 a b Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR a b c d e Stassun Keivan G et al 9 September 2019 The Revised TESS Input Catalog and Candidate Target List The Astronomical Journal 158 4 138 arXiv 1905 10694 Bibcode 2019AJ 158 138S doi 10 3847 1538 3881 ab3467 ISSN 0004 6256 a b c Gontcharov G A December 2012 Dependence of kinematics on the age of stars in the solar neighborhood Astronomy Letters 38 12 771 782 arXiv 1606 08814 Bibcode 2012AstL 38 771G doi 10 1134 S1063773712120031 ISSN 0320 0108 a b Royer F Zorec J Gomez A E 23 November 2006 Rotational velocities of A type stars Astronomy amp Astrophysics 463 2 671 682 arXiv astro ph 0610785 Bibcode 2007A amp A 463 671R doi 10 1051 0004 6361 20065224 eISSN 1432 0746 ISSN 0004 6361 Fabricius C Hog E Makarov V V Mason B D Wycoff G L Urban S E 2002 03 01 The Tycho double star catalogue Astronomy and Astrophysics 384 180 189 Bibcode 2002A amp A 384 180F doi 10 1051 0004 6361 20011822 ISSN 0004 6361 Mason Brian D Wycoff Gary L Hartkopf William I Douglass Geoffrey G Worley Charles E December 2001 The 2001 US Naval Observatory Double Star CD ROM I The Washington Double Star Catalog The Astronomical Journal 122 6 3466 3471 Bibcode 2001AJ 122 3466M doi 10 1086 323920 ISSN 0004 6256 Palmer D R Walker E N Jones D H P Wallis R E 1968 The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars Royal Greenwich Observatory Bulletins 135 385 Bibcode 1968RGOB 135 385P Abt Helmut A Morrell Nidia I July 1995 The Relation between Rotational Velocities and Spectral Peculiarities among A Type Stars The Astrophysical Journal Supplement Series 99 135 Bibcode 1995ApJS 99 135A doi 10 1086 192182 ISSN 0067 0049 Retrieved from https en wikipedia org w index php title 13 Delphini amp oldid 1127929869, wikipedia, wiki, book, books, library,

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