All names: Gaia DR2 944779452343289600, Gaia DR3 944779456640724864, Gaia EDR3 944779456640724864, SDSS J064212.72+381638.4, 2MASS J06421272+3816390, WD 0638+383, SDSS J064212.72+381638.5, WIRED J064212.71+381638.4, TIC 15862133, [SGR2010] J0642+3816, GALEX J064212.7+381638
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 06 42 12.71 (0.5) | 06 42 12.72 (0.6) | 06 42 12.72 | 06 42 12.72 (0.5) | 06 42 12.67 | 06 42 12.72 | |||
| Declination | 38 16 37.88 (0.5) | 38 16 37.91 (0.6) | 38 16 38.42 | 38 16 38.95 (0.5) | 38 16 33.96 | 38 16 38.42 | |||
| Spectral type | DA+M | DA+M4 | DA4.7+M4 | DA+M | |||||
| Effective temperature | [K] | 10918.0 (186) | 7415.0 (33) | ||||||
| log(g) | [cgs] | 8.13 (0.1) | 5.00 (0.01) | ||||||
| Mass | [M☉] | 0.68 (0.09) | |||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 6.77 (0.6) | 6.64 (0.7) | 6.77 (0.6) | |||||
| Distance | [pc] | 147.61 (14) | 150.62 (16) | 294.00 (28) | 147.61 (14) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -4.128571712 (0.5) | 1.129413045 (1) | -4.129 (0.5) | |||||
| Proper motion (declination) | [mas/yr] | -67.01212116 (0.5) | -71.82809254 (0.9) | -67.012 (0.5) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | WDMS | yes | WDMS | ||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 15.74 (0.07) | ||||||||
| H magnitude | 15.17 (0.07) | ||||||||
| K magnitude | 14.96 (0.1) | ||||||||
| u magnitude | 19.90 | 19.88 (0.04) | 19.88 | 19.90 (0.04) | |||||
| g magnitude | 19.10 | 19.05 (0.009) | 19.05 | 19.10 (0.01) | |||||
| r magnitude | 18.67 | 18.62 (0.009) | 18.62 | 18.67 (0.01) | |||||
| i magnitude | 17.70 | 17.67 (0.007) | 17.67 | 17.70 (0.01) | |||||
| z magnitude | 17.04 | 17.01 (0.01) | 17.01 | 17.04 (0.02) | |||||
| G magnitude | 18.44 (0.04) | 18.39 | 18.44 (0.01) | ||||||
| BP magnitude | 18.98 (0.04) | 18.96 | |||||||
| RP magnitude | 17.21 (0.007) | 17.21 | |||||||
| Pan g magnitude | 19.03 (0.008) | ||||||||
| Pan r magnitude | 18.63 (0.01) | ||||||||
| Pan i magnitude | 17.67 (0.004) | ||||||||
| Pan z magnitude | 17.12 (0.001) | ||||||||
| Pan y magnitude | 16.84 (0.008) | ||||||||
| E(B-V) | 0.016 | ||||||||
* 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.