All names: UCAC4 524-143849, GALEX J215154.4+144210, GALEX J215154.3+144208, Gaia DR2 1769034155197254144, HS2149+1428, UCAC2 37103415, Gaia DR3 1769034155197254144, TIC 385080597, 2MASS J21515443+1442099, HS 2149+1428
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 51 54.43 | 21 51 54.44 (0.03) | ||
| Declination | 14 42 10.64 | 14 42 10.02 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 36000.0 (1000) | ||
| log(g) | [cgs] | 5.75 (0.2) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.78 (0.06) | 0.76 (0.04) | |
| Distance | [pc] | 1288.33 (104) | 1315.44 (64) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -6.411 (0.09) | -6.165 (0.04) | |
| Proper motion (declination) | [mas/yr] | -14.647 (0.08) | -14.597 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.36 (0.04) | |||
| V magnitude | 14.47 (0.02) | |||
| R magnitude | 14.79 (0.06) | |||
| I magnitude | ||||
| J magnitude | 14.96 (0.04) | 14.96 (0.04) | ||
| H magnitude | 15.13 (0.08) | 15.13 (0.08) | ||
| K magnitude | 15.11 (0.2) | 15.11 (0.2) | ||
| u magnitude | 14.23 (0.005) | |||
| g magnitude | 14.37 (0.004) | 14.39 (0.08) | ||
| r magnitude | 14.81 (0.004) | 14.72 (0.02) | ||
| i magnitude | 15.09 (0.005) | 15.03 (0.2) | ||
| z magnitude | 15.25 (0.007) | |||
| G magnitude | 14.49 (0.0008) | 14.47 (0.003) | ||
| BP magnitude | 14.32 (0.007) | |||
| RP magnitude | 14.69 (0.002) | |||
| Pan g magnitude | 14.35 (0.003) | |||
| Pan r magnitude | 14.71 (0.002) | |||
| Pan i magnitude | 15.03 (0.002) | |||
| Pan z magnitude | 15.28 (0.003) | |||
| Pan y magnitude | 15.45 (0.006) | |||
| E(B-V) | 0.051 | |||
* 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.