WD 1217+101

All names: SDSS J121939.34+094956.4, SDSS J121939.35+094956.5, Gaia DR2 3905438363825771776, WD 1217+101, SDSS J121939.35+094956.42, Gaia EDR3 3905438363825771776, SDSS J121939.35+094956.4, SDSS J121939.34+094956.5, LBQS 1217+1006, GALEX J121939.3+094956, Gaia DR3 3905438363825771776

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 SDSS DR10 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Vincent et al. 2023
Right ascension 12 19 39.33 (0.1) 12 19 39.35 12 19 39.35 12 19 39.33 (0.2) 12 19 39.33 12 19 39.35 (0.1) 12 19 38.81
Declination 09 49 56.37 (0.1) 09 49 56.48 09 49 56.48 09 49 56.38 (0.1) 09 49 56.37 09 49 56.58 (0.1) 09 49 57.00
Spectral type DBA DB DB DB DB DB DB
Effective temperature [K] 30517.0 (766) 31524.0 25397.0 20194.0 31357.0 (234) 29737.0 (215) 28014.0 (2435)
log(g) [cgs] 7.77 (0.05) 7.79 8.07 7.94 7.81 (0.03) 7.80 (0.03) 8.00 (0.09)
Mass [M] 0.5 (0.02) 0.513 0.648 0.567 0.515 (0.006) 0.614 (0.07)
log(Luminosity) [L] -0.73 (0.06)
Cooling age [Gyr] 0.0085 (0.0007) 0.0578
log(H/He) -3.604 <-2.96
log(C/He)
log(Ca/He) <-4.0
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 2.63 (0.2) 2.92 (0.2) 2.63 2.63 (0.2)
Distance [pc] 380.00 (22) 342.09 (27) 484.00 380.00 380.00 (22)
Composition He He
Proper motion (right ascension) [mas/yr] -17.31089271 (0.2) -15.885 (0.5) -17.311 (0.2)
Proper motion (declination) [mas/yr] -12.74894644 (0.1) -12.931 (0.3) -12.749 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 18.69 (0.09)
H magnitude 18.20 (0.1)
K magnitude 18.00 (0.2)
u magnitude 17.89 (0.01) 17.91 (0.01) 17.90 (0.02) 17.91 (0.01)
g magnitude 18.03 (0.006) 18.03 (0.006) 18.04 (0.02) 18.03 (0.006)
r magnitude 18.41 (0.009) 18.40 (0.009) 18.41 (0.02) 18.40 (0.009)
i magnitude 18.74 (0.01) 18.74 (0.01) 18.75 (0.02) 18.74 (0.01)
z magnitude 18.98 (0.05) 18.98 (0.05) 18.98 (0.05) 18.98 (0.04)
G magnitude 18.24 (0.01) 18.28 18.24 18.24 (0.003)
BP magnitude 18.15 (0.01) 18.08
RP magnitude 18.47 (0.03) 18.38
Pan g magnitude 18.09 (0.006)
Pan r magnitude 18.41 (0.007)
Pan i magnitude 18.74 (0.01)
Pan z magnitude 19.00 (0.02)
Pan y magnitude 19.08 (0.02)
E(B-V) 0.025

* 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.