All names: Gaia DR2 3985905228951418752, SDSS J104242.85+181025.07, Gaia DR3 3985905228951418752, SDSS J104242.84+181025.0, SDSSJ104242.84+181025.0, SDSS J104242.85+181025.0, Gaia EDR3 3985905228951418752, GALEX J104242.8+181026
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 10 42 42.85 (0.2) | 10 42 42.85 | 10 42 42.84 | 10 42 42.85 (0.3) | 10 42 42.84 (0.2) | ||||
| Declination | 18 10 25.03 (0.2) | 18 10 25.06 | 18 10 25.00 | 18 10 25.04 (0.3) | 18 10 25.12 (0.2) | ||||
| Spectral type | He-sdO | He-sdO | sdOHe | ||||||
| Effective temperature | [K] | 50000.0 (50) | |||||||
| log(g) | [cgs] | 7.00 (0.01) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.14 (0.2) | 0.40 (0.3) | 0.40 (0.3) | 0.14 (0.2) | ||||
| Distance | [pc] | 6977.44 (11476) | 2474.63 (1981) | 2474.63 (1981) | 6978.37 (11478) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 0.651244367 (0.3) | 0.563 (0.6) | 0.563 (0.6) | 0.651 (0.3) | ||||
| Proper motion (declination) | [mas/yr] | -5.510563281 (0.3) | -5.974 (0.7) | -5.974 (0.7) | -5.511 (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 | 17.82 (0.01) | 17.82 (0.01) | 17.86 (0.03) | 17.82 (0.01) | |||||
| g magnitude | 18.23 (0.007) | 18.23 (0.007) | 18.27 (0.02) | 18.23 (0.007) | |||||
| r magnitude | 18.72 (0.009) | 18.72 (0.009) | 18.74 (0.01) | 18.72 (0.009) | |||||
| i magnitude | 19.09 (0.01) | 19.09 (0.01) | 19.09 (0.03) | 19.09 (0.01) | |||||
| z magnitude | 19.41 (0.06) | 19.41 (0.06) | 19.40 (0.06) | 19.41 (0.06) | |||||
| G magnitude | 18.49 (0.02) | 18.53 (0.007) | 18.53 | 18.49 (0.004) | |||||
| BP magnitude | 18.30 (0.02) | ||||||||
| RP magnitude | 18.93 (0.05) | ||||||||
| Pan g magnitude | 18.30 (0.006) | 18.30 (0.006) | |||||||
| Pan r magnitude | 18.74 (0.003) | 18.74 (0.003) | |||||||
| Pan i magnitude | 19.13 (0.008) | 19.13 (0.008) | |||||||
| Pan z magnitude | 19.44 (0.02) | 19.44 (0.01) | |||||||
| Pan y magnitude | 19.63 (0.04) | 19.63 (0.04) | |||||||
| E(B-V) | 0.022 | ||||||||
* 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.