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.
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.