All names: UCAC4 493-007441, HIP 20547, LAMOST J042409.66+083317.2, Renson 7130, uvby98 620004012, Gaia DR1 3299455105841141888, WISE J042409.68+083317.0, TIC 372920238, HIC 20547, FB 37, TYC 668-1204-1, LAMOSTJ042409.66+083317.2, Cl* Melotte 25 HZ 12, 2MASS J04240968+0833172, GSC 00668-01204, HZ 12, WISEA J042409.69+083316.9, Gaia DR3 3299455110137611776, GALAH 161106003601330, Gaia DR2 3299455110137611776, BPS BS 17571-0069, GALAH 161107002801330
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 04 24 09.66 | 04 24 09.69 (0.03) | ||
| Declination | 08 33 17.29 | 08 33 17.13 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 26797.0 (187) | ||
| log(g) | [cgs] | 5.24 (0.02) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 2.01 (0.06) | 1.86 (0.03) | |
| Distance | [pc] | 497.81 (15) | 538.79 (9) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 16.518 (0.09) | 16.559 (0.04) | |
| Proper motion (declination) | [mas/yr] | -18.973 (0.07) | -19.05 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 12.58 (0.03) | |||
| V magnitude | 12.54 (0.01) | |||
| R magnitude | 12.79 (0.05) | |||
| I magnitude | ||||
| J magnitude | 12.60 (0.03) | 12.60 (0.03) | ||
| H magnitude | 12.63 (0.03) | 12.63 (0.03) | ||
| K magnitude | 12.68 (0.03) | 12.68 (0.03) | ||
| u magnitude | 13.86 (0.007) | |||
| g magnitude | 12.55 (0.001) | 12.47 (0.03) | ||
| r magnitude | 12.76 (0.001) | 12.65 (0.04) | ||
| i magnitude | 12.97 (0.001) | 12.86 (0.04) | ||
| z magnitude | 13.49 (0.008) | |||
| G magnitude | 12.53 (0.0004) | 12.51 (0.003) | ||
| BP magnitude | 12.47 (0.007) | |||
| RP magnitude | 12.53 (0.002) | |||
| Pan g magnitude | 12.88 | |||
| Pan r magnitude | 12.99 | |||
| Pan i magnitude | 13.08 | |||
| Pan z magnitude | 13.05 (0.02) | |||
| Pan y magnitude | 13.14 (0.004) | |||
| E(B-V) | 0.228 | |||
* 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.