1 Vulpeculae

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Template:Short description

1 Vulpeculae
Template:Location mark
Location of 1 Vulpeculae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Vulpecula
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 4.77[2]
Characteristics
Spectral type B4IV[3]
U−B Template:Engvar -0.54[2]
B−V Template:Engvar -0.05[2]
Astrometry
Radial velocity (Rv)−17.00[4] km/s
Proper motion (μ) RA: Script error: No such module "val".[1] mas/yr
Dec.: Script error: No such module "val".[1] mas/yr
Parallax (π)4.2065±0.1557 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)-2.20[3]
Details
Mass6.9[5] Template:Solar mass
Luminosity919[3] Template:Solar luminosity
Surface gravity (log g)3.74[6] cgs
Temperature16,787[6] K
Metallicity [Fe/H]0.00[6] dex
Rotational velocity (v sin i)80[7] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
CCDM J19162+2123A, BD+21 3713, FK5 3540, GC 26569, GSC 01611-02043, 2MASS J19161302+2123257, HIP 94703, HR 7306, HD 180554, SAO 87010, WDS J19162+2123A
Database references
SIMBADdata

Script error: No such module "Check for unknown parameters".

1 Vulpeculae is a class B4IV[3] (blue subgiant) star in the constellation Vulpecula. Its apparent magnitude is 4.77[2] and it is approximately 780 light years away based on parallax.[1]

The primary was discovered to be a spectroscopic binary in 1978 with a period around 250 days although the orbital elements are described as marginal.[8] There are also companions B, with magnitude 11.6 and separation 39.1", and C, with magnitude 12.8 and separation 43.6".[9][10]

Component A is also a suspected variable star, reported to vary from 4.57 to 4.77 in magnitude.[11] It was reported as possibly variable in 1952 during a search for β CMa variables,[12] but has not been seen to vary since. It was listed as one of the least variable stars based on Hipparcos photometry.[13]

On 29 May 1983, 1 Vulpeculae was occulted by the asteroid Pallas. This event was observed at 130 locations in the United States and Mexico and was the best observed of all asteroid occultation events.[14]

References

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  1. ↑ a b c d e f Template:Cite Gaia EDR3
  2. ↑ a b c d Script error: No such module "Citation/CS1".
  3. ↑ a b c d Script error: No such module "Citation/CS1". Vizier catalog entry
  4. ↑ Script error: No such module "Citation/CS1".
  5. ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
  6. ↑ a b c Script error: No such module "Citation/CS1".
  7. ↑ Script error: No such module "Citation/CS1".
  8. ↑ Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
  10. ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ Script error: No such module "Citation/CS1".
  13. ↑ Script error: No such module "Citation/CS1".
  14. ↑ Script error: No such module "Citation/CS1".

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Template:Stars of Vulpecula

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