Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Equuleus |
Right ascension | 21h 02m 12.50262s[1] |
Declination | +07° 10′ 47.1545″[1] |
Apparent magnitude (V) | 6.698[2] (7.41 + 7.64)[3] |
Characteristics | |
Spectral type | F6V[4] |
Astrometry | |
Radial velocity (Rv) | −4.8±1.6[5] km/s |
Absolute magnitude (MV) | 2.16±0.18[2] |
A | |
Proper motion (μ) | RA: −9.184[6] mas/yr Dec.: −12.915[6] mas/yr |
Parallax (π) | 8.8125 ± 0.2481 mas[6] |
Distance | 370 ± 10 ly (113 ± 3 pc) |
B | |
Proper motion (μ) | RA: −4.238[7] mas/yr Dec.: −17.934[7] mas/yr |
Parallax (π) | 8.5577 ± 0.0298 mas[7] |
Distance | 381 ± 1 ly (116.9 ± 0.4 pc) |
Details | |
2 Equ A | |
Mass | 1.73[5] M☉ |
Radius | 3.37[8] R☉ |
Luminosity | 13.087[8] L☉ |
Surface gravity (log g) | 4.05[5] cgs |
Temperature | 6,561±80[5] K |
Metallicity [Fe/H] | 0.17[5] dex |
Age | 1.6[5] Gyr |
2 Equ B | |
Radius | 2.74[9] R☉ |
Luminosity | 10.828 L☉ |
Temperature | 6,330[9] K |
Other designations | |
Database references | |
SIMBAD | data |
2 Equulei is a double star system in the constellation of Equuleus.
The primary component of the 2 Equulei pair is an F-type main sequence star. As of 2015, the secondary had an angular separation of 2.90 arc seconds along a position angle of 213° from the primary.[3] They form a common proper motion pair, two stars at approximately the same distance and moving in the same direction.[4] Gaia EDR3 gives them parallaxes of 8.8125±0.2471 mas and 8.5577±0.0298 mas respectively, although they are flagged as potentially unreliable.[6][7] These parallaxes correspond to a distance of around 380 ly, in contrast to the Hipparcos distance of 260±20 ly for the two stars as a pair.[1]
2 Equulei has been referred to in some sources as λ (Lambda) Equulei, although it was not given that designation by Bayer.
vanLeeuwen2007
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was invoked but never defined (see the help page).edr3a
was invoked but never defined (see the help page).edr3b
was invoked but never defined (see the help page).dr2a
was invoked but never defined (see the help page).dr2b
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