All names: GJ 246, ASCC 481665, WD 0644+376, GCRV 4413, LHS 1870, G 87-7, Ci 20 398, He 3, 2MASS J06473802+3730587, WD 0644+37, HIP 32560, GEN# +9.80087007, HIC 32560, WD 0644+375, UCAC4 638-037761, UBV 6712, LTT 11917, uvby98 980087007, UCAC2 44989285, 06476+3730, LP 254-26, CSI+37-06442, L 1534-1, PLX 1579, WEB 6569, J0647+3730, TIC 16430678, CNS5 1688, EGGR 50, PLX 1579.00, TYC 2941-1747-1, ** JNN 6A, G 107-21, WISEA J064737.78+373047.2, LFT 487, USNO 24, USNO-B1.0 1275-00173025, [E38] 76, NLTT 16983, LAWD 23, WDS J06476+3731A, G87-7, SDSS J064737.85+373050.6, G 103-61, Gaia EDR3 943770757800160384, LAMOST J064737.83+373049.7, EG 50, LHS 1870, PM J06476+3730, Gaia DR3 943770757800160384, Gaia DR2 943770757800160384, SDSS J064737.86+373050.6, WDJ064737.99+373057.06, WISE J064737.79+373047.5, LSPM J0647+3730
Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | McCleery et al. 2020 | Kilic et al. 2020 | Gaia DR2 | Bedard et al. 2017 | Tremblay et al. 2017 | Stilism | Holberg et al. 2016 | Limoges et al. 2015 | Sion et al. 2014 | Giammichele et al. 2012 | Gianninas et al. 2011 | Holberg et al. 2008 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Right ascension | 06 47 37.68 (0.04) | 06 47 37.69 (0.1) | 06 47 37.69 (0.1) | 06 47 37.92 | 06 47 37.68 | 06 47 37.99 (0.04) | 06 47 37.69 | 06 47 39.07 | |||||||||||||
Declination | 37 30 42.06 (0.04) | 37 30 42.53 (0.1) | 37 30 42.53 (0.1) | 37 30 54.00 | 37 30 42.06 | 37 30 57.07 (0.04) | 37 30 42.53 | 37 31 34.32 | |||||||||||||
Spectral type | DA | DA | DA | DA | DA | DA | DA | DA | DA2.4 | DA | DA | DA | DA | DA2.3 | DA2 | ||||||
Effective temperature | [K] | 19491.0 (84) | 21394.0 (432) | 21174.9 (497) | 21161.0 (36) | 21996.0 (254) | 22290.0 (340) | 22288.0 (341) | 22140.0 (337) | 22288.0 | 22288.0 (341) | 22290.0 (341) | 22492.0 (230) | ||||||||
log(g) | [cgs] | 8.07 (0.006) | 8.14 (0.02) | 8.14 (0.03) | 8.19 (0.003) | 8.15 (0.04) | 8.10 (0.05) | 8.10 (0.05) | 8.09 (0.05) | 8.10 (0.05) | 8.10 (0.05) | 8.20 (0.008) | |||||||||
Mass | [M☉] | 0.662 (0.005) | 0.712 (0.01) | 0.736 (0.002) | 0.69 (0.03) | 0.68 (0.03) | 0.69 (0.03) | 0.69 (0.03) | 0.75 (0.007) | ||||||||||||
log(Luminosity) | [L☉] | -1.49 | -1.48 | ||||||||||||||||||
Cooling age | [Gyr] | 0.0700 | 0.0500 | ||||||||||||||||||
log(H/He) | |||||||||||||||||||||
log(C/He) | |||||||||||||||||||||
log(Ca/He) | |||||||||||||||||||||
log(Ca/H) | |||||||||||||||||||||
log(C/H) | |||||||||||||||||||||
log(N/H) | |||||||||||||||||||||
log(O/H) | |||||||||||||||||||||
log(Na/H) | |||||||||||||||||||||
log(Mg/H) | |||||||||||||||||||||
log(Al/H) | |||||||||||||||||||||
log(Si/H) | |||||||||||||||||||||
log(P/H) | |||||||||||||||||||||
log(S/H) | |||||||||||||||||||||
log(Sc/H) | |||||||||||||||||||||
log(Ti/H) | |||||||||||||||||||||
log(Cr/H) | |||||||||||||||||||||
log(Mn/H) | |||||||||||||||||||||
log(Fe/H) | |||||||||||||||||||||
log(Ni/H) | |||||||||||||||||||||
Parallax | [mas] | 58.53 (0.04) | 58.53 (0.04) | 58.57 (0.09) | 58.57 (0.09) | 63.53 (4) | 65.51 (2) | 66.30 (2) | 64.91 (3) | 64.91 (3) | 58.53 | 58.53 (0.04) | 58.57 (0.09) | 62.60 (3) | |||||||
Distance | [pc] | 17.08 (0.01) | 17.09 (0.01) | 17.07 (0.03) | 17.07 (0.03) | 15.70 (0.9) | 15.74 (0.9) | 15.26 (0.4) | 15.10 (0.5) | 15.40 | 15.40 (0.7) | 19.00 | 15.41 | 17.08 | 17.08 (0.01) | 17.07 (0.03) | 15.97 (0.8) | ||||
Composition | H | H | H | H | H | H | H | ||||||||||||||
Proper motion (right ascension) | [mas/yr] | -229.6960021 (0.05) | -229.7279829 (0.4) | -229.696 (0.05) | -229.7279829 | ||||||||||||||||
Proper motion (declination) | [mas/yr] | -938.032836 (0.04) | -937.7632904 (0.4) | -938.033 (0.04) | -937.7632904 | ||||||||||||||||
Variability | |||||||||||||||||||||
Magnetic | |||||||||||||||||||||
Bd | [MG] | ||||||||||||||||||||
Infrared excess (disk) | |||||||||||||||||||||
Binarity | |||||||||||||||||||||
B magnitude | 11.97 (0.02) | ||||||||||||||||||||
V magnitude | 12.06 (0.01) | 12.08 | 12.08 | 12.07 (0.02) | |||||||||||||||||
R magnitude | 12.26 (0.03) | ||||||||||||||||||||
I magnitude | |||||||||||||||||||||
J magnitude | |||||||||||||||||||||
H magnitude | 12.66 (0.06) | ||||||||||||||||||||
K magnitude | |||||||||||||||||||||
u magnitude | 12.07 (0.001) | 12.07 (0.001) | |||||||||||||||||||
g magnitude | 11.93 (0.001) | 11.93 (0.001) | |||||||||||||||||||
r magnitude | 12.33 (0.001) | 12.33 (0.001) | |||||||||||||||||||
i magnitude | 12.64 (0.002) | 12.64 (0.002) | |||||||||||||||||||
z magnitude | 13.99 (0.01) | 13.99 (0.01) | |||||||||||||||||||
G magnitude | 12.06 (0.001) | 12.07 | 12.07 | 12.06 | 12.06 (0.003) | 12.07 | |||||||||||||||
BP magnitude | 11.96 (0.001) | 11.92 | 11.92 | ||||||||||||||||||
RP magnitude | 12.26 (0.0004) | 12.25 | 12.25 | ||||||||||||||||||
Pan g magnitude | 12.07 (0.02) | ||||||||||||||||||||
Pan r magnitude | 12.05 (0.06) | ||||||||||||||||||||
Pan i magnitude | 12.43 (0.04) | ||||||||||||||||||||
Pan z magnitude | 12.89 (0.01) | ||||||||||||||||||||
Pan y magnitude | 13.02 (0.004) | ||||||||||||||||||||
E(B-V) | 0.000 |
* Constant surface field
Spectra without link are available upon request
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.