SDSS J230706.90+082145.8

All names: Gaia DR3 2713617271700011008, Gaia EDR3 2713617271700011008, Gaia DR2 2713617271700011008, SDSS J230706.90+082145.9, SDSS J230706.90+082145.86, J2307+0821, WDJ230706.88+082146.46, SDSS J230706.90+082145.8

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 Caron et al. 2023 MWDD H MWDD HE Gaia DR2 Stilism Kepler et al. 2016 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Vincent et al. 2023
Right ascension 23 07 06.93 (0.2) 23 07 06.90 23 07 06.93 (0.4) 23 07 06.93 23 07 06.88 (0.2) 23 07 06.93
Declination 08 21 44.82 (0.2) 08 21 45.90 08 21 44.87 (0.3) 08 21 44.82 08 21 46.46 (0.2) 08 21 44.87
Spectral type DC DC DC DC DC DC: DC DC
Effective temperature [K] 6363.0 (70) 6047.0 (82) 6659.0 6425.0 6812.0 (72) 5707.0 (452)
log(g) [cgs] 8.27 (0.03) 8.18 (0.05) 8.45 8.35 8.00 (0) 8.07 (0.1)
Mass [M] 0.745 (0.03) 0.682 (0.04) 0.883 0.8 0.615 (0.09)
log(Luminosity) [L]
Cooling age [Gyr] 3.7700 4.0460 3.9860
log(H/He) -3.0
log(C/He)
log(Ca/He)
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] 10.15 (0.3) 10.64 (0.5) 10.64 (0.5) 10.15 10.15 (0.3) 10.64 (0.5)
Distance [pc] 98.48 (3) 93.98 (4) 93.98 (4) 98.48 98.48 (3) 93.98 (4)
Composition He He
Proper motion (right ascension) [mas/yr] 46.88126819 (0.3) 46.86330906 (0.8) 46.881 (0.3) 46.86330906
Proper motion (declination) [mas/yr] -103.0877624 (0.3) -102.8826894 (0.7) -103.088 (0.3) -102.8826894
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.17 (0.05) 20.15 (0.05) 20.18 (0.04) 20.17 (0.05) 20.17 (0.05)
g magnitude 19.44 (0.01) 19.45 (0.02) 19.44 (0.01) 19.44 (0.01)
r magnitude 19.16 (0.01) 19.17 (0.01) 19.15 (0.01) 19.15 (0.01)
i magnitude 19.10 (0.02) 19.10 (0.02) 19.09 (0.02) 19.09 (0.02)
z magnitude 19.13 (0.05) 19.10 (0.05) 19.11 (0.06) 19.11 (0.06)
G magnitude 19.17 (0.04) 19.21 19.17 19.17 (0.004) 19.21
BP magnitude 19.37 (0.04) 19.42 19.42
RP magnitude 18.76 (0.04) 18.68 18.68
Pan g magnitude 19.40 (0.01) 19.40 (0.01)
Pan r magnitude 19.15 (0.008) 19.15 (0.007)
Pan i magnitude 19.11 (0.009) 19.11 (0.009)
Pan z magnitude 19.12 (0.009) 19.12 (0.01)
Pan y magnitude 19.25 (0.03) 19.25 (0.03)
E(B-V) 0.017

* 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.