All names: SDSS J081740.08+002959.8, Gaia DR2 3077505592715661440, Gaia EDR3 3077505592715661440, SDSS J081740.09+002959.8, Gaia DR3 3077505592715661440
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|
| Right ascension | 08 17 40.08 (0.3) | 08 17 40.09 | 08 17 40.08 (0.4) | 08 17 40.09 (0.3) | 08 17 40.09 | ||
| Declination | 00 29 59.73 (0.2) | 00 29 59.89 | 00 29 59.74 (0.4) | 00 29 59.83 (0.2) | 00 29 59.84 | ||
| Spectral type | DA | DA | DA | ||||
| Effective temperature | [K] | 51586.0 (3478) | 54194.0 (3030) | ||||
| log(g) | [cgs] | 8.05 (0.2) | 7.93 (0.2) | ||||
| Mass | [M☉] | 0.71 (0.1) | 0.656 (0.09) | ||||
| log(Luminosity) | [L☉] | 0.05 (0.2) | |||||
| Cooling age | [Gyr] | 0.0017 (0.0003) | |||||
| 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] | -0.14 (0.3) | -0.34 (0.5) | ||||
| Distance | [pc] | ||||||
| Composition | H | ||||||
| Proper motion (right ascension) | [mas/yr] | -2.235548865 (0.4) | -2.447196614 (0.9) | -2.236 (0.4) | |||
| Proper motion (declination) | [mas/yr] | -6.173795801 (0.3) | -6.432005796 (0.6) | -6.174 (0.3) | |||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | |||||||
| B magnitude | |||||||
| V magnitude | |||||||
| R magnitude | |||||||
| I magnitude | |||||||
| J magnitude | |||||||
| H magnitude | |||||||
| K magnitude | |||||||
| u magnitude | 18.90 (0.02) | 18.75 (0.02) | 18.75 (0.02) | ||||
| g magnitude | 19.29 (0.01) | 19.17 (0.01) | 19.17 (0.01) | ||||
| r magnitude | 19.83 (0.02) | 19.70 (0.02) | 19.70 (0.02) | ||||
| i magnitude | 24.36 (0.8) | 20.11 (0.04) | 20.11 (0.04) | ||||
| z magnitude | 22.83 (0.6) | 20.61 (0.2) | 20.61 (0.2) | ||||
| G magnitude | 19.39 (0.03) | 19.45 | 19.39 (0.004) | ||||
| BP magnitude | 19.21 (0.03) | 19.16 | |||||
| RP magnitude | 19.70 (0.09) | 19.62 | |||||
| Pan g magnitude | |||||||
| Pan r magnitude | |||||||
| Pan i magnitude | |||||||
| Pan z magnitude | |||||||
| Pan y magnitude | |||||||
| E(B-V) | |||||||
* 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.