SDSS J092234.17+212142.9

All names: SDSS J092234.17+212143.0, J0922+2121, SDSS J092234.17+212142.9, SDSS J092234.16+212142.9, Gaia EDR3 637716641031134848, Gaia DR3 637716641031134848, GALEX J092234.1+212143, Gaia DR2 637716641031134848, SDSS J092234.17+212142.97, WDJ092234.15+212142.90

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Kilic et al. 2025 Caron et al. 2023 MWDD H MWDD HE Gaia DR2 Stilism Kepler et al. 2015 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Vincent et al. 2023
Right ascension 09 22 34.22 (0.2) 09 22 34.17 09 22 34.22 (0.5) 09 22 34.22 09 22 34.15 (0.2) 09 22 34.22
Declination 21 21 42.92 (0.2) 21 21 42.96 21 21 42.92 (0.6) 21 21 42.92 21 21 42.92 (0.2) 21 21 42.92
Spectral type DC DC: DC: DC: DC: DC DC DC
Effective temperature [K] 6526.0 (58) 6491.0 (52) 7050.0 6788.0 10402.0 (1000) 6353.0 (161)
log(g) [cgs] 8.14 (0.02) 8.06 (0.03) 8.32 8.22 6.50 (0.5) 8.15 (0.04)
Mass [M] 0.659 (0.02) 0.608 (0.03) 0.797 0.711 0.669 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 2.1400 2.9040 2.6870
log(H/He) -3.2 -3.2
log(C/He)
log(Ca/He)
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] 13.40 (0.2) 12.84 (0.3) 12.84 (0.3) 13.40 13.40 (0.2) 12.84 (0.3)
Distance [pc] 74.64 (1) 77.88 (2) 77.88 (2) 74.64 74.64 (1) 77.88 (2)
Composition He
Proper motion (right ascension) [mas/yr] 60.68553756 (0.3) 58.90171706 (0.9) 60.686 (0.3) 58.90171706
Proper motion (declination) [mas/yr] -0.485514792 (0.2) 1.28448014 (1) -0.486 (0.2) 1.28448014
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 17.71 (0.05)
H magnitude
K magnitude
u magnitude 19.13 (0.02) 19.12 (0.02) 19.13 (0.02) 19.13 (0.02) 19.13 (0.02)
g magnitude 18.55 (0.008) 18.55 (0.01) 18.55 (0.008) 18.57 (0.007)
r magnitude 18.35 (0.008) 18.35 (0.01) 18.36 (0.008) 18.34 (0.008)
i magnitude 18.30 (0.009) 18.30 (0.01) 18.30 (0.009) 18.32 (0.009)
z magnitude 18.33 (0.02) 18.33 (0.02) 18.33 (0.02) 18.34 (0.02)
G magnitude 18.33 (0.02) 18.35 18.33 18.33 (0.003) 18.35
BP magnitude 18.55 (0.02) 18.53 18.53
RP magnitude 18.00 (0.02) 18.00 18.00
Pan g magnitude 18.52 (0.02) 18.52 (0.01)
Pan r magnitude 18.34 (0.006) 18.34 (0.006)
Pan i magnitude 18.33 (0.007) 18.33 (0.007)
Pan z magnitude 18.38 (0.005) 18.38 (0.006)
Pan y magnitude 18.42 (0.02) 18.42 (0.02)
E(B-V) 0.003

* 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.