Gaia DR2 438686001110484352

All names: Gaia DR2 438686001110484352, LAMOST J025020.84+491233.9, 2MASS J02502085+4912340, Gaia DR3 438686001110484352, LAMOSTJ025020.85+491234.0, UCAC4 697-019941

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 02 50 20.84 02 50 20.85 (0.03)
Declination 49 12 34.00 49 12 34.02 (0.03)
Spectral type sdB sdB
Effective temperature [K] 31040.0 (160)
log(g) [cgs] 5.56 (0.04)
Mass [M☉]
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 0.72 (0.05) 0.80 (0.04)
Distance [pc] 1391.40 (103) 1257.07 (58)
Composition
Proper motion (right ascension) [mas/yr] 0.889 (0.1) 0.472 (0.04)
Proper motion (declination) [mas/yr] -3.259 (0.1) -2.933 (0.04)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.82 (0.1)
V magnitude 15.85 (0.01)
R magnitude 16.11 (0.2)
I magnitude
J magnitude 15.88 (0.07) 15.88 (0.07)
H magnitude 16.13 (0.2) 16.13 (0.2)
K magnitude 15.44
u magnitude
g magnitude 15.69 (0.01)
r magnitude 15.89 (0.01)
i magnitude
z magnitude
G magnitude 15.76 (0.0007) 15.74 (0.003)
BP magnitude 15.70 (0.006)
RP magnitude 15.74 (0.003)
Pan g magnitude 15.72 (0.005)
Pan r magnitude 15.88 (0.004)
Pan i magnitude 16.08 (0.005)
Pan z magnitude 16.25 (0.005)
Pan y magnitude 16.36 (0.007)
E(B-V) 0.229

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit




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.