All names: Gaia DR2 1350113181268869632, Gaia DR3 1350113181268869632, Gaia EDR3 1350113181268869632, SDSS J174242.39+443013.4, LAMOSTJ174242.39+443013.4, UCAC4 673-064389, LAMOST J174242.39+443013.4, 2MASS J17424239+4430135
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 42 42.40 (0.04) | 17 42 42.40 | 17 42 42.40 (0.04) | ||
| Declination | 44 30 13.41 (0.04) | 44 30 13.45 | 44 30 13.48 (0.04) | ||
| Spectral type | sdOB | sdOB | |||
| Effective temperature | [K] | 40682.0 (512) | |||
| log(g) | [cgs] | 6.06 (0.07) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.41 (0.05) | 0.50 (0.06) | 0.41 (0.05) | |
| Distance | [pc] | 2438.43 (276) | 2003.61 (222) | 2438.43 (276) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 2.27 (0.06) | 3.038 (0.1) | 2.27 (0.06) | |
| Proper motion (declination) | [mas/yr] | -4.263 (0.05) | -4.848 (0.1) | -4.263 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.62 (0.1) | 16.62 (0.1) | |||
| H magnitude | 16.06 | ||||
| K magnitude | 16.86 | ||||
| u magnitude | 15.43 (0.005) | 15.41 (0.005) | |||
| g magnitude | 15.75 (0.004) | 15.75 (0.004) | |||
| r magnitude | 16.25 (0.004) | 16.26 (0.004) | |||
| i magnitude | 16.60 (0.006) | 16.61 (0.006) | |||
| z magnitude | 16.91 (0.01) | 16.92 (0.01) | |||
| G magnitude | 16.00 (0.003) | 16.02 (0.002) | 16.00 (0.003) | ||
| BP magnitude | 15.85 (0.004) | 15.79 (0.009) | |||
| RP magnitude | 16.31 (0.006) | 16.30 (0.006) | |||
| Pan g magnitude | 15.83 (0.005) | ||||
| Pan r magnitude | 16.27 (0.003) | ||||
| Pan i magnitude | 16.64 (0.002) | ||||
| Pan z magnitude | 16.92 (0.005) | ||||
| Pan y magnitude | 17.08 (0.01) | ||||
| E(B-V) | 0.031 | ||||
* 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.