All names: SDSS J155238.86+293848.9, Gaia DR3 1320844009938692096, SDSSJ155238.86+293848.9, Gaia DR2 1320844009938692096
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 15 52 38.86 | 15 52 38.86 (0.2) | ||
| Declination | 29 38 48.90 | 29 38 48.96 (0.2) | ||
| Spectral type | sdB | DA | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.26 (0.3) | 0.26 (0.3) | |
| Distance | [pc] | 3850.60 (4940) | 3850.60 (4940) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -3.697 (0.5) | -3.323 (0.2) | |
| Proper motion (declination) | [mas/yr] | -3.815 (0.6) | -3.773 (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 | 19.36 (0.03) | 19.36 (0.03) | ||
| g magnitude | 19.44 (0.01) | 19.44 (0.01) | ||
| r magnitude | 19.58 (0.01) | 19.58 (0.01) | ||
| i magnitude | 19.62 (0.02) | 19.62 (0.02) | ||
| z magnitude | 19.77 (0.08) | 19.77 (0.08) | ||
| G magnitude | 19.51 (0.004) | 19.47 (0.004) | ||
| BP magnitude | 19.49 (0.04) | |||
| RP magnitude | 19.31 (0.05) | |||
| Pan g magnitude | 19.49 (0.01) | |||
| Pan r magnitude | 19.63 (0.01) | |||
| Pan i magnitude | 19.68 (0.01) | |||
| Pan z magnitude | 19.75 (0.02) | |||
| Pan y magnitude | 19.74 (0.04) | |||
| E(B-V) | 0.028 | |||
* 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.