BD+20 5125B

All names: Gaia EDR3 1778836056545324160, LSPM J2219+2122W, 22194+2122, TIC 353035668, Gaia DR3 1778836056545324160, PM J22194+2122, SDSS J221928.69+212221.5, Gaia DR2 1778836056545324160, LP 460-3, PSO J334.8703+21.3730, LP 460-003, NLTT 53526, ** LDS 4956B, J2219+2122, 2MASS J22192853+2122194, USNO-B1.0 1113-00582739, WDJ221928.57+212220.58, BD+20 5125B, WD 2217+211, WDS J22196+2122B, CCDM J22196+2122B

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Caron et al. 2023 Blouin et al. 2019 MWDD H MWDD HE Gaia DR2 Tremblay et al. 2017 Stilism Limoges et al. 2015 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 22 19 28.99 (0.1) 22 19 28.98 (0.1) 22 19 28.99 22 19 28.57 (0.1) 22 19 28.98 22 19 27.62
Declination 21 22 23.87 (0.1) 21 22 23.76 (0.2) 21 22 23.87 21 22 20.57 (0.1) 21 22 23.76 21 22 05.16
Spectral type DC DC DC DC DC DC DC DC: DC9 DC9
Effective temperature [K] 4748.0 (23) 4764.0 (19) 4395.0 (90) 5229.0 4927.0 4600.0 (355) 4796.0 (51)
log(g) [cgs] 7.33 (0.07) 7.16 (0.02) 6.79 (0.1) 7.78 7.56 8.00 (0) 7.17 (0.04)
Mass [M☉] 0.319 (0.06) 0.21 (0.007) 0.08 (0.04) 0.457 0.339 0.58 (0.1) 0.212 (0.01)
log(Luminosity) [L☉] -4.19
Cooling age [Gyr] 1.8100 1.6100 (0.2) 2.5410 2.5620
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(Li/H)
log(Be/H)
log(B/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Cl/H)
log(K/H)
log(Sc/H)
log(Ti/H)
log(V/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Co/H)
log(Ni/H)
log(Cu/H)
log(Sr/H)
Parallax [mas] 18.52 (0.1) 18.61 (0.2) 18.61 (0.2) 18.61 (0.2) 18.76 (0.4) 18.52 18.52 (0.1) 18.61 (0.2) 20.10 (2)
Distance [pc] 54.01 (0.4) 53.73 (0.5) 53.72 (0.5) 53.72 (0.5) 53.30 (1) 32.00 (7) 54.01 54.01 (0.4) 53.72 (0.5) 49.75 (5)
Composition H H He H
Proper motion (right ascension) [mas/yr] 368.3824724 (0.1) 368.0949353 (0.2) 368.382 (0.1) 368.0949353
Proper motion (declination) [mas/yr] 205.8519058 (0.1) 205.3760083 (0.3) 205.852 (0.1) 205.3760083
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity yes
B magnitude 19.10
V magnitude 17.69 (0.05) 18.30
R magnitude 17.40
I magnitude
J magnitude 16.41 (0.02) 16.45 (0.1) 16.45 (0.1)
H magnitude
K magnitude 16.02 (0.3) 16.02 (0.3) 16.02 (0.3)
u magnitude 20.27 (0.03) 20.27 (0.04) 20.27 (0.04)
g magnitude 18.42 (0.009) 18.54 (0.007)
r magnitude 17.71 (0.004) 17.73 (0.006)
i magnitude 17.43 (0.005) 17.41 (0.007)
z magnitude 17.32 (0.009) 17.24 (0.01)
G magnitude 17.75 (0.02) 17.77 17.67 (0.004) 17.75 17.75 (0.003) 17.77
BP magnitude 18.35 (0.02) 18.34 18.34
RP magnitude 17.10 (0.01) 17.10 17.10
Pan g magnitude 18.42 (0.009) 18.42 (0.009) 18.42 (0.009)
Pan r magnitude 17.71 (0.004) 17.71 (0.004) 17.71 (0.004)
Pan i magnitude 17.43 (0.004) 17.43 (0.004) 17.43 (0.005)
Pan z magnitude 17.32 (0.007) 17.32 (0.007) 17.32 (0.009)
Pan y magnitude 17.28 (0.03) 17.28 (0.03) 17.28 (0.02)
E(B-V) 0.004

* 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.