All names: SDSS J081237.84+173701.0, WD 0809+177, EPIC 211821115, Gaia DR3 657056745624156416, TIC 27634101, Gaia EDR3 657056745624156416, PM J08126+1737, 08126+1737, Gaia DR2 657056745624156416, GALEX J081237.8+173701, SDSS J081237.83+173701.0, WDJ081237.81+173701.43, J0812+1737, 2MASS J08123779+1737016
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | Kilic et al. 2020 | McCleery et al. 2020 | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 12 37.89 (0.02) | 08 12 37.89 (0.04) | 08 12 37.89 (0.04) | 08 12 37.89 | 08 12 37.81 (0.02) | 08 12 37.89 | 08 12 37.66 | |||||||
| Declination | 17 37 00.03 (0.02) | 17 37 00.07 (0.02) | 17 37 00.07 (0.02) | 17 37 00.03 | 17 37 01.43 (0.02) | 17 37 00.07 | 17 36 57.24 | |||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 16272.0 (92) | 16028.0 (271) | 16273.0 (90) | 16111.9 (125) | 16400.0 (241) | 16651.0 (164) | |||||||
| log(g) | [cgs] | 8.08 (0.005) | 8.04 (0.02) | 8.07 (0.005) | 8.05 (0.01) | 8.09 (0.04) | 8.09 (0.008) | |||||||
| Mass | [M☉] | 0.66 (0.004) | 0.641 (0.01) | 0.659 (0.005) | 0.67 (0.03) | 0.67 (0.006) | ||||||||
| log(Luminosity) | [L☉] | -2.02 | ||||||||||||
| Cooling age | [Gyr] | |||||||||||||
| 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] | 36.98 (0.03) | 36.98 (0.03) | 36.95 (0.04) | 36.95 (0.04) | 36.98 | 36.98 (0.03) | 36.95 (0.04) | ||||||
| Distance | [pc] | 27.04 (0.02) | 27.04 (0.02) | 27.07 (0.03) | 27.07 (0.03) | 32.70 (1) | 27.04 | 27.04 (0.02) | 27.07 (0.03) | |||||
| Composition | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 73.48248998 (0.03) | 73.49375493 (0.08) | 73.482 (0.03) | 73.49375493 | |||||||||
| Proper motion (declination) | [mas/yr] | -87.17126932 (0.02) | -87.2743031 (0.05) | -87.171 (0.02) | -87.2743031 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | 13.46 | |||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 13.76 | 13.76 (0.03) | ||||||||||||
| H magnitude | 13.84 | 13.84 (0.04) | ||||||||||||
| K magnitude | 13.94 | 13.94 (0.05) | ||||||||||||
| u magnitude | 14.01 | 13.98 (0.004) | 13.49 (0.003) | |||||||||||
| g magnitude | 14.55 | 13.99 (0.006) | 14.91 (0.01) | |||||||||||
| r magnitude | 15.20 | 15.23 (0.01) | 13.57 (0.003) | |||||||||||
| i magnitude | 14.23 | 14.21 (0.003) | 13.84 (0.004) | |||||||||||
| z magnitude | 14.26 | 14.25 (0.004) | 14.14 (0.004) | |||||||||||
| G magnitude | 13.43 (0.0009) | 13.44 | 13.44 | 13.43 | 13.43 (0.003) | 13.44 | ||||||||
| BP magnitude | 13.38 (0.0009) | 13.36 | 13.36 | |||||||||||
| RP magnitude | 13.55 (0.0007) | 13.56 | 13.56 | |||||||||||
| Pan g magnitude | 13.33 (0.001) | |||||||||||||
| Pan r magnitude | 13.60 (0.003) | |||||||||||||
| Pan i magnitude | 13.88 (0.005) | |||||||||||||
| Pan z magnitude | 14.12 (0.002) | |||||||||||||
| Pan y magnitude | 14.29 (0.007) | |||||||||||||
| 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.