13 Delphini

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
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[3]
Declination +06° 00′ 28.127″[3]
Apparent magnitude (V) 8.51[2]
Characteristics
A
Evolutionary stage main sequence[4]
Spectral type A0 V[5]
U−B color index −0.09[6]
B−V color index −0.01[6]
Astrometry
Radial velocity (Rv)−7±4.3[7] km/s
Absolute magnitude (MV)−0.01[8]
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[3]
Dec.: −12.280 mas/yr[3]
Parallax (π)6.6697±0.0989 mas[3]
Distance489 ± 7 ly
(150 ± 2 pc)
Details
A
Mass2.51+0.31
−0.36[9] M☉
Radius3.7±0.4[9] R☉
Luminosity119+20
−17[4] L☉
Surface gravity (log g)3.69+0.61
−0.69[9] cgs
Temperature9,840+91
−90[4] K
Metallicity [Fe/H]0.00[10] dex
Rotational velocity (v sin i)170[11] km/s
Age307[10] Myr
B
Mass1.5[12] M☉
Surface gravity (log g)3.90[12] cgs
Temperature6,449[12] K
Metallicity [Fe/H]−0.14[12] dex
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 is a binary star[2] in the northern constellation of Delphinus, with a combined apparent magnitude of 5.64.[13] 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.[7]

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°.[14]

13 Delphini has a blended stellar classification of A0 V,[5] 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.[15] It has 2.51 times the mass of the Sun[9] and has an effective temperature of 9,840 K.[4] 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.[4] This is due to 13 Delphini having completed 86.1% of its main sequence lifetime[4] and has led one source to classify it as a subgiant instead.[16] It spins rapidly with a projected rotational velocity of 170 km/s[11] and has an age of 307 million years.[10]

This star has been designated Lambda Delphini by Johann Elert Bode, but the designation is generally unused now.[17]

References

[edit | edit source]
  1. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
  2. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  3. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
  4. ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  5. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  6. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  7. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  8. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  9. ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  10. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  11. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  12. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  13. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  14. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  15. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  16. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  17. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
Retrieved from "http://70.231.62.181/index.php?title=13_Delphini&oldid=12029310"