CSO 172

All names: Gaia DR3 1464867178339097216, SDSS J124920.37+290454.2, GALEX J124920.4+290454, Gaia DR2 1464867178339097216, Gaia EDR3 1464867178339097216, CSO 172, SDSS J124920.37+290454.1, LAMOST J124920.37+290454.2, A2 54, SDSS J124920.37+290454.20, SDSS J124920.34+290454.2

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 49 20.32 (0.1) 12 49 20.37 12 49 20.32 (0.2) 12 49 20.32 12 49 20.39 (0.1) 12 49 20.37
Declination 29 04 54.16 (0.1) 29 04 54.19 29 04 54.16 (0.2) 29 04 54.16 29 04 54.11 (0.1) 29 04 54.21
Spectral type DB DB DB DB DB
Effective temperature [K] 16314.0 17429.0 15026.0 16234.0 (73) 16435.0 (1877) 16890.0 (153)
log(g) [cgs] 8.01 8.31 8.10 8.13 (0.05) 8.11 (0.2) 8.30 (0.09)
Mass [M] 0.598 0.788 0.649 0.658 (0.1) 0.771 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.2352
log(H/He) <-6.038 -5.11 (0.4)
log(C/He)
log(Ca/He) <-6.94
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] 3.20 (0.2) 3.43 (0.3) 3.20 3.20 (0.2)
Distance [pc] 312.48 (19) 291.18 (23) 304.00 312.48 312.48 (19)
Composition He
Proper motion (right ascension) [mas/yr] -55.72954112 (0.2) -55.58430961 (0.4) -55.73 (0.2)
Proper motion (declination) [mas/yr] 2.826758024 (0.2) 2.776353385 (0.3) 2.827 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.40
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.49 (0.02) 18.49 (0.02) 18.50 (0.03)
g magnitude 18.59 (0.008) 18.59 (0.008) 18.63 (0.02)
r magnitude 18.92 (0.01) 18.92 (0.01) 18.92 (0.02)
i magnitude 19.17 (0.02) 19.18 (0.02) 19.17 (0.02)
z magnitude 19.51 (0.08) 19.51 (0.08) 19.51 (0.08)
G magnitude 18.72 (0.02) 18.76 18.72 18.72 (0.004)
BP magnitude 18.65 (0.02) 18.63
RP magnitude 18.85 (0.03) 18.83
Pan g magnitude 18.63 (0.007)
Pan r magnitude 18.88 (0.009)
Pan i magnitude 19.14 (0.01)
Pan z magnitude 19.38 (0.02)
Pan y magnitude 19.53 (0.1)
E(B-V) 0.013

* 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.