All names: SDSS J121703.12+454539.35, CBS 461, Gaia DR2 1539014020563855232, Gaia EDR3 1539014020563855232, SDSS J121703.14+454539.4, SDSS J121703.14+454539.3, SDSSJ121703.12+454539.35, Gaia DR3 1539014020563855232, GALEX J121703.1+454539, SDSS J121703.12+454539.3
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 17 03.12 (0.05) | 12 17 03.14 | 12 17 03.12 | 12 17 03.12 (0.07) | 12 17 03.15 (0.05) | ||||
| Declination | 45 45 39.20 (0.07) | 45 45 39.39 | 45 45 39.35 | 45 45 39.20 (0.08) | 45 45 39.32 (0.07) | ||||
| Spectral type | He-sdOB | sdO | sdOBHe | ||||||
| Effective temperature | [K] | 30000.0 (10000) | |||||||
| log(g) | [cgs] | 6.00 (0) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.44 (0.1) | 0.21 (0.1) | 0.21 (0.1) | 0.44 (0.1) | ||||
| Distance | [pc] | 2270.52 (491) | 4755.11 (2795) | 4755.11 (2795) | 2270.66 (490) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -23.25636959 (0.07) | -23.371 (0.1) | -23.371 (0.1) | -23.256 (0.07) | ||||
| Proper motion (declination) | [mas/yr] | -7.289410244 (0.1) | -7.312 (0.2) | -7.312 (0.2) | -7.289 (0.1) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 16.99 (0.008) | 17.00 (0.008) | 16.99 (0.02) | 16.99 (0.008) | |||||
| g magnitude | 17.36 (0.005) | 17.35 (0.005) | 17.37 (0.02) | 17.36 (0.005) | |||||
| r magnitude | 17.85 (0.006) | 17.85 (0.006) | 17.87 (0.02) | 17.85 (0.006) | |||||
| i magnitude | 18.19 (0.009) | 18.19 (0.009) | 18.19 (0.02) | 18.20 (0.009) | |||||
| z magnitude | 18.53 (0.03) | 18.53 (0.03) | 18.54 (0.03) | 18.53 (0.03) | |||||
| G magnitude | 17.62 (0.008) | 17.65 (0.002) | 17.65 | 17.62 (0.003) | |||||
| BP magnitude | 17.48 (0.008) | 17.39 (0.01) | 17.39 | ||||||
| RP magnitude | 17.92 (0.04) | 17.89 (0.02) | 17.89 | ||||||
| Pan g magnitude | 17.44 (0.005) | 17.44 (0.005) | |||||||
| Pan r magnitude | 17.86 (0.005) | 17.86 (0.005) | |||||||
| Pan i magnitude | 18.24 (0.005) | 18.23 (0.005) | |||||||
| Pan z magnitude | 18.51 (0.006) | 18.51 (0.006) | |||||||
| Pan y magnitude | 18.70 (0.02) | 18.70 (0.02) | |||||||
| 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.