All names: GALEX J155309.5+632440, Gaia EDR3 1640097759502807936, HS 1552+6333, Gaia DR3 1640097759502807936, USNO-B1.0 1534-00216519, FBS1552+635, Gaia DR2 1640097759502807936, FBS B 735, SDSS J155309.63+632440.3, FBS 1552+635
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 15 53 09.62 (0.05) | 15 53 09.64 | 15 53 09.63 (0.05) | ||
| Declination | 63 24 40.26 (0.04) | 63 24 40.65 | 63 24 40.31 (0.04) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 34100.0 (800) | |||
| log(g) | [cgs] | 5.55 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.51 (0.05) | 0.44 (0.07) | 0.51 (0.05) | |
| Distance | [pc] | 1956.56 (175) | 2294.63 (350) | 1956.56 (175) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -2.623 (0.06) | -2.812 (0.1) | -2.623 (0.06) | |
| Proper motion (declination) | [mas/yr] | -3.497 (0.05) | -3.309 (0.1) | -3.497 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 16.80 | ||||
| V magnitude | 15.80 | ||||
| R magnitude | 16.40 | ||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 15.74 (0.005) | 15.75 (0.01) | |||
| g magnitude | 16.02 (0.003) | 16.04 (0.02) | |||
| r magnitude | 16.52 (0.004) | 16.52 (0.01) | |||
| i magnitude | 16.88 (0.005) | 16.88 (0.01) | |||
| z magnitude | 17.20 (0.01) | 17.20 (0.02) | |||
| G magnitude | 16.27 (0.003) | 16.29 (0.002) | 16.27 (0.003) | ||
| BP magnitude | 16.12 (0.004) | 16.06 (0.007) | |||
| RP magnitude | 16.58 (0.006) | 16.57 (0.005) | |||
| Pan g magnitude | 16.08 (0.003) | ||||
| Pan r magnitude | 16.54 (0.002) | ||||
| Pan i magnitude | 16.91 (0.004) | ||||
| Pan z magnitude | 17.20 (0.005) | ||||
| Pan y magnitude | 17.40 (0.01) | ||||
| E(B-V) | 0.020 | ||||
* 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.