All names: SDSS J231557.87+302723.74, Gaia DR3 1909566099301746944, Gaia DR2 1909566099301746944, SDSS J231557.87+302723.7, Gaia EDR3 1909566099301746944
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|
| Right ascension | 23 15 57.87 (0.8) | 23 15 57.87 | 23 15 57.87 (1) | 23 15 57.87 (0.8) | |||
| Declination | 30 27 23.75 (0.9) | 30 27 23.74 | 30 27 23.75 (1) | 30 27 23.75 (0.9) | |||
| Spectral type | sdA: | sdA | |||||
| Effective temperature | [K] | 11249.0 (226) | |||||
| log(g) | [cgs] | 4.42 (0.03) | |||||
| Mass | [M☉] | ||||||
| log(Luminosity) | [L☉] | ||||||
| Cooling age | [Gyr] | ||||||
| log(H/He) | |||||||
| log(C/He) | |||||||
| log(Ca/He) | |||||||
| log(Ca/H) | |||||||
| Parallax | [mas] | -0.31 (1) | -0.55 (1) | ||||
| Distance | [pc] | ||||||
| Composition | |||||||
| Proper motion (right ascension) | [mas/yr] | 2.914375332 (1) | 2.809138131 (2) | 2.914 (1) | |||
| Proper motion (declination) | [mas/yr] | -0.009999693 (1) | 0.442805893 (3) | -0.01 (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 | 21.47 (0.1) | 21.45 (0.1) | 21.45 (0.1) | ||||
| g magnitude | 20.90 (0.03) | 20.93 (0.03) | 20.93 (0.03) | ||||
| r magnitude | 20.74 (0.04) | 20.77 (0.04) | 20.77 (0.04) | ||||
| i magnitude | 20.59 (0.05) | 20.64 (0.06) | 20.64 (0.06) | ||||
| z magnitude | 20.33 (0.2) | 20.35 (0.2) | 20.35 (0.2) | ||||
| G magnitude | 20.73 (0.2) | 20.78 | 20.73 (0.01) | ||||
| BP magnitude | 21.04 (0.2) | 21.13 | |||||
| RP magnitude | 20.20 (0.1) | 20.25 | |||||
| Pan g magnitude | 20.93 (0.06) | ||||||
| Pan r magnitude | 20.70 (0.02) | ||||||
| Pan i magnitude | 20.61 (0.01) | ||||||
| Pan z magnitude | 20.53 (0.03) | ||||||
| Pan y magnitude | 19.95 (0.2) | ||||||
| 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.