Gaia DR2 4215241712185612544

All names: Gaia DR2 4215241712185612544, WDJ193019.71-005730.55, UCAC4 446-113945, Gaia DR3 4215241712185612544, Gaia EDR3 4215241712185612544, WDJ193019.71-005730.56, TIC 249232669, 2MASS J19301972-0057306, J1930-0057

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 Tremblay et al. 2020 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018
Right ascension 19 30 19.72 (0.04) 19 30 19.72 19 30 19.72 19 30 19.71 (0.04) 19 30 19.72
Declination -00 57 30.63 (0.03) -00 57 30.63 -00 57 30.63 -00 57 30.55 (0.03) -00 57 30.63
Spectral type DC DC DC DC DC
Effective temperature [K] 7601.0 (73) 7478.0 (29) 7620.0 (80) 8139.0 7823.0 7522.0 (68)
log(g) [cgs] 8.15 (0.03) 8.12 (0.006) 8.17 (0.03) 8.38 8.29 8.14 (0.01)
Mass [M] 0.667 (0.02) 0.647 (0.006) 0.837 0.759 0.662 (0.01)
log(Luminosity) [L]
Cooling age [Gyr] 1.6200 2.0720 1.9620
log(H/He) -3.6
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] 28.49 (0.05) 28.49 (0.05) 28.58 (0.07) 28.58 (0.07) 28.49 28.49 (0.05) 28.58 (0.07)
Distance [pc] 35.10 (0.06) 35.10 (0.06) 34.99 (0.09) 34.99 (0.08) 35.10 35.10 (0.06) 34.99 (0.08)
Composition He
Proper motion (right ascension) [mas/yr] 0.471664363 (0.05) 0.467395908 (0.1) 0.472 (0.04) 0.467395908
Proper motion (declination) [mas/yr] -4.807677961 (0.04) -4.657098402 (0.09) -4.808 (0.04) -4.657098402
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude 15.93 (0.3)
I magnitude
J magnitude 15.75 (0.07) 15.75 (0.07)
H magnitude 15.63 (0.1) 15.63 (0.1)
K magnitude
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 16.16 (0.003) 16.18 16.16 16.16 (0.003) 16.18
BP magnitude 16.28 (0.003) 16.27 16.27
RP magnitude 15.93 (0.003) 15.94 15.94
Pan g magnitude 16.29 (0.002) 16.29 (0.003)
Pan r magnitude 16.22 (0.003) 16.22 (0.003)
Pan i magnitude 16.27 (0.002) 16.27 (0.001)
Pan z magnitude 16.36 (0.009) 16.36 (0.01)
Pan y magnitude 16.45 (0.007) 16.45 (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.