PHL 178

All names: EC 21484-2121, 2MASS J21511307-2107042, PHL178, GALAH 170802004901332, TYC 6375-424-1, Gaia DR3 6817299093841252864, Gaia DR2 6817299093841252864, uvby98 610160178, TIC 25300088, PHL 178

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 21 51 13.06 21 51 13.08 (0.04)
Declination -21 07 04.18 -21 07 04.26 (0.04)
Spectral type He-sdO sdO7.5VIIHe40
Effective temperature [K]
log(g) [cgs]
Mass [M☉]
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 1.24 (0.1) 1.32 (0.06)
Distance [pc] 804.44 (63) 758.73 (32)
Composition
Proper motion (right ascension) [mas/yr] 0.959 (0.1) 0.758 (0.06)
Proper motion (declination) [mas/yr] -12.526 (0.1) -12.546 (0.04)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 12.92 (0.2)
V magnitude 12.50 (0.2)
R magnitude
I magnitude
J magnitude 13.71 (0.02) 13.71 (0.02)
H magnitude 13.82 (0.04) 13.82 (0.04)
K magnitude 13.97 (0.05) 13.97 (0.05)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 13.03 (0.002) 13.00 (0.003)
BP magnitude 12.79 (0.01)
RP magnitude 13.31 (0.002)
Pan g magnitude 12.76
Pan r magnitude 13.27
Pan i magnitude 13.64 (0.005)
Pan z magnitude 13.92 (0.002)
Pan y magnitude 14.13 (0.006)
E(B-V) 0.022

* 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.