All names: TD1 30861, Gaia DR3 2120323958447382272, BD+48 2721, TIC 47581488, LAMOST J183409.58+482739.8, TYC 3531-1327-1, 2MASS J18340919+4827398, GEN# +0.04802721, Gaia DR2 2120323958447382272, BD+482721
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 18 34 09.16 | 18 34 09.20 (0.03) | ||
| Declination | 48 27 39.89 | 48 27 39.86 (0.03) | ||
| Spectral type | sdB | sdB4 | ||
| Effective temperature | [K] | 24800.0 (1100) | ||
| log(g) | [cgs] | 5.38 (0.1) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 3.40 (0.04) | 3.47 (0.03) | |
| Distance | [pc] | 294.22 (4) | 287.79 (2) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 17.176 (0.08) | 17.089 (0.04) | |
| Proper motion (declination) | [mas/yr] | 65.302 (0.09) | 65.219 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 10.50 | |||
| V magnitude | 10.70 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 11.11 (0.02) | 11.11 (0.02) | ||
| H magnitude | 11.21 (0.02) | 11.21 (0.02) | ||
| K magnitude | 11.28 (0.02) | 11.28 (0.02) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 10.66 (0.0005) | 10.66 (0.003) | ||
| BP magnitude | 10.56 (0.001) | |||
| RP magnitude | 10.86 (0.001) | |||
| Pan g magnitude | 10.51 (0.07) | |||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | 15.80 (0.009) | |||
| E(B-V) | 0.023 | |||
* 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.