All names: Gaia EDR3 691116660913783936, WD 0840+262, UBV M 43096, FB 51, Ton 10, WDJ084359.37+260256.59, Gaia DR2 691116660913783936, Gaia DR3 691116660913783936, TIC 117278328, TON 10, GSC 01945-01976, PG 0840+262, GEN# +6.10070010, 2MASS J08435938+2602566, EGGR 291, GALEX J084359.2+260257, SDSS J084359.33+260256.4
Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | MWDD HE | Gaia DR2 | Stilism | Koester et al. 2014 | Bergeron et al. 2011 | Wegner et al. 1987 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Right ascension | 08 43 59.23 (0.03) | 08 43 59.24 (0.05) | 08 43 59.23 | 08 43 59.37 (0.03) | 08 43 59.24 | 08 43 57.62 | ||||||||
Declination | 26 02 55.78 (0.02) | 26 02 55.80 (0.03) | 26 02 55.78 | 26 02 56.59 (0.02) | 26 02 55.80 | 26 03 13.68 | ||||||||
Spectral type | DBA | DBA | DBA | DB | DB3 | DB3 | ||||||||
Effective temperature | [K] | 18060.0 (354) | 17643.0 | 17770.0 | 17770.0 (421) | 16000.0 | 18157.0 (223) | |||||||
log(g) | [cgs] | 8.18 (0.02) | 8.15 | 8.30 | 8.30 (0.07) | 8.19 (0.01) | ||||||||
Mass | [M☉] | 0.706 (0.01) | 0.684 | 0.78 (0.04) | 0.707 (0.01) | |||||||||
log(Luminosity) | [L☉] | -2.01 | ||||||||||||
Cooling age | [Gyr] | 0.1559 | 0.1995 | |||||||||||
log(H/He) | -4.0 | -3.98 (0.05) | -4.5 | |||||||||||
log(C/He) | <-8.3 | <-7 | ||||||||||||
log(Ca/He) | ||||||||||||||
log(Ca/H) | ||||||||||||||
log(N/He) | ||||||||||||||
log(O/He) | ||||||||||||||
log(Na/He) | ||||||||||||||
log(Mg/He) | ||||||||||||||
log(Al/He) | ||||||||||||||
log(Si/He) | <-9.0 | |||||||||||||
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] | 18.39 (0.04) | 18.35 (0.07) | 18.39 | 18.39 (0.04) | 18.35 (0.07) | ||||||||
Distance | [pc] | 54.38 (0.1) | 54.49 (0.2) | 49.00 | 54.38 | 54.38 (0.1) | 54.49 (0.2) | |||||||
Composition | He | He | He | |||||||||||
Proper motion (right ascension) | [mas/yr] | -114.0448616 (0.04) | -114.0811304 (0.1) | -114.045 (0.04) | -114.0811304 | |||||||||
Proper motion (declination) | [mas/yr] | -50.86154523 (0.03) | -50.77539351 (0.06) | -50.862 (0.03) | -50.77539351 | |||||||||
Variability | ||||||||||||||
Magnetic | ||||||||||||||
Bd | [MG] | |||||||||||||
Infrared excess (disk) | ||||||||||||||
Binarity | ||||||||||||||
B magnitude | 14.68 | |||||||||||||
V magnitude | 14.78 | 14.78 | ||||||||||||
R magnitude | ||||||||||||||
I magnitude | ||||||||||||||
J magnitude | 15.28 (0.004) | |||||||||||||
H magnitude | 15.34 (0.08) | |||||||||||||
K magnitude | 15.39 (0.02) | |||||||||||||
u magnitude | 14.48 (0.004) | 14.50 (0.003) | ||||||||||||
g magnitude | 14.60 (0.003) | 14.62 (0.003) | ||||||||||||
r magnitude | 14.95 (0.003) | 14.95 (0.003) | ||||||||||||
i magnitude | 15.22 (0.004) | 15.22 (0.003) | ||||||||||||
z magnitude | 15.52 (0.006) | 15.51 (0.006) | ||||||||||||
G magnitude | 14.78 (0.001) | 14.80 | 14.78 | 14.78 (0.003) | 14.80 | |||||||||
BP magnitude | 14.70 (0.001) | 14.66 | 14.66 | |||||||||||
RP magnitude | 14.92 (0.001) | 14.93 | 14.93 | |||||||||||
Pan g magnitude | 14.67 (0.004) | |||||||||||||
Pan r magnitude | 14.97 (0.002) | |||||||||||||
Pan i magnitude | 15.26 (0.001) | |||||||||||||
Pan z magnitude | 15.50 (0.003) | |||||||||||||
Pan y magnitude | 15.67 (0.007) | |||||||||||||
E(B-V) | 0.001 |
* Constant surface field
Spectra without link are available upon request
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.