All names: UCAC4 679-077999, Gaia DR2 2082064806400098304, 2MASS J20085771+4536054, KPD2007+4527, TIC 185668633, Gaia DR3 2082064806400098304, KPD 2007+4527, WISEA J200857.71+453605.3, WISE J200857.71+453605.3
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 08 57.73 | 20 08 57.71 (0.02) | ||
| Declination | 45 36 05.95 | 45 36 05.50 (0.02) | ||
| 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] | 0.69 (0.04) | 0.60 (0.03) | |
| Distance | [pc] | 1455.60 (90) | 1663.34 (74) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -10.927 (0.08) | -10.879 (0.03) | |
| Proper motion (declination) | [mas/yr] | -4.665 (0.07) | -4.598 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.35 (0.04) | |||
| V magnitude | 15.17 (0.04) | |||
| R magnitude | 15.10 (0.09) | |||
| I magnitude | ||||
| J magnitude | 14.38 (0.03) | 14.38 (0.03) | ||
| H magnitude | 14.09 (0.05) | 14.09 (0.05) | ||
| K magnitude | 13.97 (0.06) | 13.97 (0.06) | ||
| u magnitude | ||||
| g magnitude | 15.16 (0.02) | |||
| r magnitude | 15.21 (0.02) | |||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.05 (0.0009) | 15.03 (0.003) | ||
| BP magnitude | 15.08 (0.005) | |||
| RP magnitude | 14.85 (0.004) | |||
| Pan g magnitude | 15.10 (0.005) | |||
| Pan r magnitude | 15.17 (0.002) | |||
| Pan i magnitude | 15.21 (0.005) | |||
| Pan z magnitude | 15.24 (0.002) | |||
| Pan y magnitude | 15.24 (0.003) | |||
| E(B-V) | 0.257 | |||
* 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.