All names: SDSS J123819.05+090813.7, SDSS J123819.05+090813.73, [SHM2017] J189.57940+09.13715, Gaia DR3 3903031502808975616, ZTF J123819.04+090813.8, Gaia EDR3 3903031502808975616, Gaia DR2 3903031502808975616, [ZHV2014] 647
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|
| Right ascension | 12 38 19.04 (0.3) | 12 38 19.05 | 12 38 19.04 (0.3) | 12 38 19.04 (0.3) | |||
| Declination | 09 08 13.67 (0.3) | 09 08 13.74 | 09 08 13.67 (0.3) | 09 08 13.66 (0.3) | |||
| Spectral type | sdA | sdA | |||||
| Effective temperature | [K] | 9514.0 (174) | |||||
| log(g) | [cgs] | 6.00 (0) | |||||
| Mass | [M☉] | 0.17694 (1e-05) | |||||
| log(Luminosity) | [L☉] | ||||||
| Cooling age | [Gyr] | ||||||
| log(H/He) | |||||||
| log(C/He) | |||||||
| log(Ca/He) | |||||||
| log(Ca/H) | |||||||
| Parallax | [mas] | 0.49 (0.4) | 0.16 (0.4) | 0.49 (0.4) | |||
| Distance | [pc] | 2023.55 (1587) | 6321.43 (16687) | 2023.47 (1587) | |||
| Composition | |||||||
| Proper motion (right ascension) | [mas/yr] | -1.832539292 (0.4) | -0.451870324 (1) | -1.833 (0.4) | |||
| Proper motion (declination) | [mas/yr] | 0.433116958 (0.5) | -0.394186885 (0.9) | 0.433 (0.5) | |||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | |||||||
| B magnitude | |||||||
| V magnitude | 19.39 | ||||||
| R magnitude | |||||||
| I magnitude | |||||||
| J magnitude | |||||||
| H magnitude | |||||||
| K magnitude | |||||||
| u magnitude | 21.00 (0.08) | 21.00 (0.08) | 21.00 (0.08) | ||||
| g magnitude | 19.73 (0.01) | 19.74 (0.02) | 19.74 (0.02) | ||||
| r magnitude | 19.56 (0.02) | 19.56 (0.02) | 19.56 (0.02) | ||||
| i magnitude | 19.50 (0.02) | 19.48 (0.02) | 19.48 (0.02) | ||||
| z magnitude | 19.51 (0.06) | 19.48 (0.06) | 19.28 (0.03) | ||||
| G magnitude | 19.30 (0.07) | 19.35 | 19.30 (0.01) | ||||
| BP magnitude | 19.44 (0.07) | 19.33 | |||||
| RP magnitude | 18.94 (0.05) | 18.98 | |||||
| Pan g magnitude | |||||||
| Pan r magnitude | |||||||
| Pan i magnitude | |||||||
| Pan z magnitude | |||||||
| Pan y magnitude | |||||||
| E(B-V) | 0.024 | ||||||
* 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.