LS II +22 21

All names: GEN# +8.02220021, LS II +22 21, UBV M 50892, ALS 10795, Gaia DR2 1832976906773684224, TYC 1629-2447-1, Gaia EDR3 1832976906773684224, Gaia DR3 1832976906773684224, LSII+2221, 2MASS J20045751+2220397, TIC 288444625, CSI+22-20028

Parameter Unit Gaia EDR3 Geier 2020 Stilism Simbad
Right ascension 20 04 57.50 (0.03) 20 04 57.58 20 04 57.52 (0.03)
Declination 22 20 39.68 (0.03) 22 20 40.21 22 20 39.84 (0.03)
Spectral type sdO sdO
Effective temperature [K]
log(g) [cgs]
Mass [M☉]
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 3.08 (0.05) 3.26 (0.06) 3.08 (0.05)
Distance [pc] 324.22 (5) 306.29 (6) 324.22 (5)
Composition
Proper motion (right ascension) [mas/yr] -14.199 (0.04) -14.406 (0.09) -14.199 (0.04)
Proper motion (declination) [mas/yr] -9.534 (0.04) -9.691 (0.08) -9.534 (0.04)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 12.23
V magnitude 12.58
R magnitude
I magnitude
J magnitude 13.31 (0.02) 13.31 (0.02)
H magnitude 13.47 (0.03) 13.47 (0.03)
K magnitude 13.58 (0.04) 13.58 (0.04)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 12.49 (0.003) 12.51 (0.0005) 12.49 (0.003)
BP magnitude 12.31 (0.003) 12.23 (0.007)
RP magnitude 12.87 (0.004) 12.86 (0.001)
Pan g magnitude 12.51
Pan r magnitude 12.96
Pan i magnitude 13.31
Pan z magnitude 13.54 (0.005)
Pan y magnitude 13.75 (0.003)
E(B-V) 0.031

* Constant surface field

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The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.