[HCP84] U6

All names: GALEX J123006.3+114826, [VV2000] J123006.4+114827, [VV96] J123006.4+114827, [HCP84] U6, [HB93] 1227+120B, SDSS J123006.36+114826.5, Gaia DR2 3907602099629825152, [VV98] J123006.4+114827, Gaia EDR3 3907602099629825152, Gaia DR3 3907602099629825152, [VV2003] J123006.4+114827, [VV2006] J123006.4+114827, [VV2010] J123006.4+114827, SDSS J123006.36+114826.7, SDSS J123006.36+114826.53, USNO-B1.0 1018-00231792

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Simbad Vincent et al. 2023
Right ascension 12 30 06.36 (0.3) 12 30 06.37 12 30 06.36 (0.3) 12 30 06.36 (0.3)
Declination 11 48 26.58 (0.2) 11 48 26.74 11 48 26.59 (0.2) 11 48 26.75 (0.2)
Spectral type DB DB DB DB
Effective temperature [K] 15355.0 16003.0 15879.0 15424.0 (80) 15606.0 (125)
log(g) [cgs] 8.19 8.05 8.08 8.00 (0) 8.14 (0.09)
Mass [M] 0.706 0.619 0.638 0.688 (0.05)
log(Luminosity) [L]
Cooling age [Gyr] 0.1910
log(H/He) -5.868 <-5.17
log(C/He)
log(Ca/He) <-7.04
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
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] 2.33 (0.3) 2.46 (0.4) 2.33 (0.3)
Distance [pc] 429.15 (57) 405.75 (69) 396.00 429.15 (57)
Composition He
Proper motion (right ascension) [mas/yr] 0.590861036 (0.4) 1.24670518 (0.9) 0.591 (0.4)
Proper motion (declination) [mas/yr] -10.56452145 (0.3) -10.77541875 (0.5) -10.565 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 19.20
V magnitude 19.30
R magnitude 19.50
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.13 (0.02) 19.09 (0.04) 19.12 (0.03)
g magnitude 19.18 (0.01) 19.18 (0.02) 19.18 (0.01)
r magnitude 19.49 (0.02) 19.48 (0.02) 19.49 (0.02)
i magnitude 19.66 (0.02) 19.66 (0.03) 19.66 (0.02)
z magnitude 19.97 (0.1) 19.95 (0.09) 19.97 (0.1)
G magnitude 19.31 (0.04) 19.36 19.31 (0.004)
BP magnitude 19.34 (0.04) 19.24
RP magnitude 19.40 (0.09) 19.42
Pan g magnitude 19.18 (0.01)
Pan r magnitude 19.44 (0.01)
Pan i magnitude 19.73 (0.02)
Pan z magnitude 19.95 (0.007)
Pan y magnitude 20.10 (0.2)
E(B-V) 0.025

* 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.