PG 1554+222

All names: LAMOST J155633.69+220246.3, PG1554+222, TIC 229554789, PG 1554+222, 2MASS J15563361+2202459, GALEX J155633.6+220246, [TFW97] J155633.62+220245.81, Gaia DR2 1206214356465503616, Gaia DR3 1206214356465503616

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 15 56 33.65 15 56 33.62 (0.02)
Declination 22 02 46.25 22 02 45.89 (0.02)
Spectral type He-sdO sdOB
Effective temperature [K] 70564.0 (767)
log(g) [cgs] 5.67 (0.03)
Mass [M☉]
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 0.55 (0.06) 0.65 (0.03)
Distance [pc] 1821.83 (195) 1537.04 (76)
Composition
Proper motion (right ascension) [mas/yr] -8.179 (0.08) -8.253 (0.03)
Proper motion (declination) [mas/yr] -0.914 (0.09) -0.817 (0.03)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 13.35
V magnitude
R magnitude
I magnitude
J magnitude 14.49 (0.03) 14.49 (0.03)
H magnitude 14.52 (0.05) 14.52 (0.05)
K magnitude 14.59 (0.1) 14.59 (0.1)
u magnitude 13.17 (0.004)
g magnitude
r magnitude 14.03 (0.004)
i magnitude 14.40 (0.004)
z magnitude 14.73 (0.005)
G magnitude 13.81 (0.0006) 13.80 (0.003)
BP magnitude 13.57 (0.01)
RP magnitude 14.08 (0.002)
Pan g magnitude 13.65 (0.005)
Pan r magnitude 14.07 (0.002)
Pan i magnitude 14.43 (0.002)
Pan z magnitude 14.70 (0.003)
Pan y magnitude 14.88 (0.003)
E(B-V) 0.058

* 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.