HS 1830+7209

All names: HS 1830+7209, Gaia DR3 2265870543161146880, Gaia DR2 2265870543161146880, WD 1830+721, Gaia EDR3 2265870543161146880, USNO-B1.0 1621-00135791

Parameter Unit Gaia EDR3 Gaia DR2 Stilism Dreizler et al. 1996 Simbad White Dwarf Catalog (McCook & Sion 1999)
Right ascension 18 30 04.70 (0.05) 18 30 04.70 (0.05) 18 30 04.71 (0.05) 18 30 03.89
Declination 72 11 35.86 (0.05) 72 11 35.86 (0.05) 72 11 35.95 (0.05) 72 11 31.20
Spectral type DO DO DO
Effective temperature [K] 100000.0
log(g) [cgs] 7.20
Mass [M☉] 0.47
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 0.27 (0.05) 0.38 (0.06) 0.27 (0.05)
Distance [pc] 3720.91 (658) 2628.12 (382) 3720.24 (657)
Composition
Proper motion (right ascension) [mas/yr] -3.524822762 (0.06) -3.861 (0.1) -3.525 (0.06)
Proper motion (declination) [mas/yr] -5.425684906 (0.06) -5.439 (0.1) -5.426 (0.06)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.10
V magnitude
R magnitude 17.10
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 16.53 (0.003) 16.57 16.53 (0.003)
BP magnitude 16.36 (0.003) 16.29
RP magnitude 16.84 (0.007) 16.84
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.044

* 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.