All names: UCAC4 458-060493, TIC 5730610, PG 1620+017, Gaia DR3 4432739337073332352, PG1620+017, Gaia DR2 4432739337073332352, 2MASS J16230733+0135015, UCAC2 32386291
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 16 23 07.33 | 16 23 07.32 (0.05) | ||
| Declination | 01 35 01.66 | 01 35 01.62 (0.03) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.70 (0.1) | 0.77 (0.06) | |
| Distance | [pc] | 1430.21 (195) | 1305.65 (104) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 2.424 (0.1) | 2.382 (0.06) | |
| Proper motion (declination) | [mas/yr] | -0.286 (0.09) | -0.221 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.49 (0.02) | |||
| V magnitude | 15.49 (0.01) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.03 (0.09) | 16.03 (0.09) | ||
| H magnitude | 16.10 (0.2) | 16.10 (0.2) | ||
| K magnitude | 15.92 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.54 (0.0009) | 15.52 (0.003) | ||
| BP magnitude | 15.33 (0.009) | |||
| RP magnitude | 15.78 (0.004) | |||
| Pan g magnitude | 15.37 (0.002) | |||
| Pan r magnitude | 15.77 (0.003) | |||
| Pan i magnitude | 16.11 (0.003) | |||
| Pan z magnitude | 16.35 (0.007) | |||
| Pan y magnitude | 16.55 (0.009) | |||
| E(B-V) | 0.074 | |||
* 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.