All names: LTT 9387B, Gaia DR2 6387649708219253248, Gaia EDR3 6387649708219253248, NAME LTT 9387B, CCDM J23103-6850B, LTT9387B, CNS5 5708, HD218572, WDJ231022.85-685023.96, 2MASS J23102283-6850239, HD 218572B, Gaia DR3 6387649708219253248, TIC 260795156
| Parameter | Unit | Gaia EDR3 | O'Brien et al. 2024 | Subasavage et al. 2022 | Gaia DR2 | Subasavage et al. 2017 | Stilism | Holberg et al. 2016 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 10 23.05 (0.01) | 23 10 23.04 (0.03) | 23 10 23.05 | 23 10 22.85 (0.01) | 23 10 23.04 | ||||||
| Declination | -68 50 18.83 (0.01) | -68 50 18.99 (0.03) | -68 50 18.83 | -68 50 23.96 (0.01) | -68 50 18.99 | ||||||
| Spectral type | DB | DB | DB | DA | DB | DB | |||||
| Effective temperature | [K] | 10780.0 (116) | 10370.0 (524) | 10910.0 (470) | 9837.0 (2000) | 10991.0 (51) | |||||
| log(g) | [cgs] | 7.91 (0.02) | 7.79 (0.09) | 7.93 (0.06) | 7.94 (0) | 7.97 (0.006) | |||||
| Mass | [M☉] | 0.53 (0.01) | 0.465 (0.06) | 0.54 (0.05) | 0.57 (0) | 0.564 (0.005) | |||||
| log(Luminosity) | [L☉] | -2.65 (0.08) | |||||||||
| Cooling age | [Gyr] | 0.4500 (0.07) | 0.6000 | ||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | |||||||||||
| log(Mg/He) | |||||||||||
| log(Al/He) | |||||||||||
| log(Si/He) | |||||||||||
| log(P/He) | |||||||||||
| log(S/He) | |||||||||||
| log(Cl/He) | |||||||||||
| log(Sc/He) | |||||||||||
| log(Ti/He) | |||||||||||
| log(V/He) | |||||||||||
| log(Cr/He) | |||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | |||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 47.46 (0.02) | 47.46 (0.02) | 47.41 (0.04) | 47.41 (0.04) | 47.51 (0.2) | 47.75 (0.9) | 47.46 | 47.46 (0.02) | 47.41 (0.04) | |
| Distance | [pc] | 21.07 (0.007) | 21.07 (0.009) | 21.09 (0.02) | 21.09 (0.02) | 21.05 (0.08) | 20.94 (0.9) | 21.07 | 21.07 (0.007) | 21.09 (0.02) | |
| Composition | He | He | H | ||||||||
| Proper motion (right ascension) | [mas/yr] | 65.12469662 (0.02) | 65.16071463 (0.06) | 65.125 (0.02) | 65.16071463 | ||||||
| Proper motion (declination) | [mas/yr] | 320.6911734 (0.02) | 320.8163769 (0.06) | 320.691 (0.02) | 320.8163769 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | ||||||||||
| B magnitude | 13.66 | 13.66 | |||||||||
| V magnitude | 13.57 | 13.57 | 13.80 | ||||||||
| R magnitude | 13.55 | 13.55 | |||||||||
| I magnitude | 13.50 | 13.50 | |||||||||
| J magnitude | 13.60 | 13.60 (0.06) | 13.60 (0.06) | ||||||||
| H magnitude | 13.64 | 13.64 (0.1) | 13.64 (0.1) | ||||||||
| K magnitude | 13.66 | 13.66 (0.1) | 13.66 (0.1) | ||||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | 13.57 (0.001) | 13.59 | 13.57 | 13.57 (0.003) | 13.59 | ||||||
| BP magnitude | 13.58 (0.001) | 13.56 | 13.56 | ||||||||
| RP magnitude | 13.54 (0.0008) | 13.54 | 13.54 | ||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.001 | ||||||||||
* 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.