Gaia DR2 4230380819051252736

All names: SDSS J201530.34+000111.5, WDJ201530.35+000111.80, Gaia EDR3 4230380819051252736, Gaia DR2 4230380819051252736, Gaia DR3 4230380819051252736, J2015+0001, WDJ201530.35+000111.79

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Tremblay et al. 2020 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018
Right ascension 20 15 30.34 (0.07) 20 15 30.34 (0.08) 20 15 30.34 20 15 30.34 20 15 30.35 (0.07) 20 15 30.34
Declination 00 01 10.59 (0.05) 00 01 10.62 (0.06) 00 01 10.62 00 01 10.59 00 01 11.80 (0.05) 00 01 10.62
Spectral type DC DC DC DC DC DA: DC
Effective temperature [K] 4888.0 (16) 4917.0 (45) 4895.0 (14) 4755.6 (37) 4760.0 (40) 4891.0 4573.0 4986.0 (36)
log(g) [cgs] 8.02 (0.008) 8.03 (0.04) 8.04 (0.007) 7.92 (0.03) 7.92 (0.03) 8.03 7.81 8.07 (0.02)
Mass [M] 0.594 (0.007) 0.6 (0.02) 0.601 (0.007) 0.596 0.458 0.624 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 7.0100 6.5020 4.8770
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/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(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 39.26 (0.08) 39.26 (0.08) 39.33 (0.1) 39.33 (0.1) 39.33 (0.1) 39.26 39.26 (0.08) 39.33 (0.1)
Distance [pc] 25.47 (0.05) 25.47 (0.05) 25.43 (0.07) 25.43 (0.07) 25.43 (0.07) 25.47 25.47 (0.05) 25.43 (0.07)
Composition H H
Proper motion (right ascension) [mas/yr] -8.573385801 (0.08) -8.99186929 (0.2) -8.573 (0.07) -8.99186929
Proper motion (declination) [mas/yr] -75.6479871 (0.06) -75.89154703 (0.1) -75.648 (0.06) -75.89154703
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 15.70 (0.009)
H magnitude
K magnitude
u magnitude 19.45 (0.04) 19.45 (0.04) 19.45 (0.04)
g magnitude 17.82 (0.006) 17.82 (0.006)
r magnitude 16.99 (0.005) 16.99 (0.005)
i magnitude 16.65 (0.005) 16.65 (0.005)
z magnitude 16.58 (0.01) 16.58 (0.01)
G magnitude 17.03 (0.009) 17.04 17.04 17.03 17.03 (0.003) 17.04
BP magnitude 17.49 (0.009) 17.49 17.49
RP magnitude 16.36 (0.005) 16.36 16.36
Pan g magnitude 17.65 (0.006) 17.65 (0.005)
Pan r magnitude 17.00 (0.004) 17.00 (0.005)
Pan i magnitude 16.73 (0.004) 16.73 (0.004)
Pan z magnitude 16.64 (0.006) 16.64 (0.004)
Pan y magnitude 16.58 (0.006) 16.58 (0.006)
E(B-V) 0.001

* 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.