All names: PG 2337+070, LAMOST J234004.72+071709.3, UCAC4 487-138312, WISEA J234004.72+071709.1, TIC 258600326, PB 5495, uvby98 680233732, WISE J234004.72+071709.2, Balloon 93300001, Gaia DR3 2757157489778320000, SDSS J234004.73+071709.3, USNO-B1.0 0972-00737660, 2MASS J23400475+0717096, UCAC2 34388511, Gaia DR2 2757157489778320000, PG2337+070
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 23 40 04.82 | 23 40 04.75 (0.03) | ||
| Declination | 07 17 11.00 | 07 17 09.58 (0.02) | ||
| Spectral type | sdB | sdB1.5VIIHe9 | ||
| Effective temperature | [K] | 30720.0 (190) | ||
| log(g) | [cgs] | 5.93 (0.07) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 2.27 (0.06) | 2.18 (0.03) | |
| Distance | [pc] | 441.15 (12) | 459.73 (7) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -22.423 (0.1) | -22.527 (0.03) | |
| Proper motion (declination) | [mas/yr] | -40.159 (0.06) | -40.123 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.40 | |||
| V magnitude | 13.47 | |||
| R magnitude | 13.74 (0.09) | |||
| I magnitude | ||||
| J magnitude | 13.73 (0.02) | 13.73 (0.02) | ||
| H magnitude | 13.80 (0.04) | 13.80 (0.04) | ||
| K magnitude | 13.93 (0.05) | 13.93 (0.05) | ||
| u magnitude | 13.71 (0.004) | |||
| g magnitude | 13.50 (0.002) | |||
| r magnitude | 13.79 (0.003) | |||
| i magnitude | 16.34 (0.02) | |||
| z magnitude | 14.20 (0.006) | |||
| G magnitude | 13.47 (0.0005) | 13.45 (0.003) | ||
| BP magnitude | 13.36 (0.005) | |||
| RP magnitude | 13.54 (0.001) | |||
| Pan g magnitude | 13.27 | |||
| Pan r magnitude | 13.58 (0.004) | |||
| Pan i magnitude | 13.87 (0.003) | |||
| Pan z magnitude | 14.06 (0.003) | |||
| Pan y magnitude | 14.19 (0.004) | |||
| E(B-V) | 0.085 | |||
* 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.