WD 2227+232

All names: PSO J337.3922+23.4610, LP 400-6, NLTT 53996, Gaia EDR3 1875613386395668864, 2MASS J22293394+2327427, Gaia DR2 1875613386395668864, J2229+2327, TIC 411344988, Gaia DR3 1875613386395668864, USNO-B1.0 1134-00549188, WDJ222933.96+232742.24, WD 2227+232, LSPM J2229+2327, SDSS J222934.03+232741.1, SDSS J222934.04+232741.2

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2026b Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Kilic et al. 2020 Blouin et al. 2019 MWDD H Gaia DR2 Stilism Kawka et Vennes 2006 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 22 29 34.22 (0.08) 22 29 34.21 (0.1) 22 29 34.21 (0.1) 22 29 34.22 22 29 33.96 (0.08) 22 29 34.21 22 29 33.55
Declination 23 27 38.65 (0.09) 23 27 38.76 (0.1) 23 27 38.76 (0.1) 23 27 38.65 23 27 42.24 (0.09) 23 27 38.76 23 27 41.04
Spectral type DA: DA DA DA DA DA DA DA DA DA: DA DA10.1
Effective temperature [K] 5175.0 (16) 5013.0 (20) 5064.0 (71) 5052.0 (19) 4927.3 (38) 5013.0 (20) 5035.0 (25) 5060.0 5000.0 (500) 5099.0 (43)
log(g) [cgs] 8.24 (0.008) 8.11 (0.01) 8.13 (0.05) 8.14 (0.01) 8.05 (0.04) 8.11 (0.01) 8.12 (0.02) 8.14 7.00 8.16 (0.02)
Mass [M] 0.736 (0.008) 0.648 (0.009) 0.659 (0.04) 0.672 (0.01) 0.647 (0.01) 0.658 (0.01) 0.666 0.18 0.683 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 7.4000 6.8590 (0.2) 6.8500
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(Li/H)
log(Be/H)
log(B/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Cl/H)
log(K/H)
log(Sc/H)
log(Ti/H)
log(V/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Co/H)
log(Ni/H)
log(Cu/H)
log(Sr/H)
Parallax [mas] 27.37 (0.1) 27.37 (0.1) 27.36 (0.2) 27.36 (0.2) 27.36 (0.2) 27.36 (0.2) 27.37 27.37 (0.1) 27.36 (0.2)
Distance [pc] 36.54 (0.2) 36.54 (0.2) 36.55 (0.3) 36.55 (0.3) 36.55 (0.3) 36.55 (0.3) 64.00 36.54 36.54 (0.2) 36.55 (0.3)
Composition H H H H H H
Proper motion (right ascension) [mas/yr] 223.8516236 (0.1) 224.441046 (0.6) 223.852 (0.1) 224.441046
Proper motion (declination) [mas/yr] -224.2643293 (0.1) -224.4652872 (0.4) -224.264 (0.1) -224.4652872
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 20.80
V magnitude
R magnitude 17.20
I magnitude
J magnitude 16.60 (0.01) 16.36 (0.1) 16.36 (0.1)
H magnitude 16.03 (0.1) 16.03 (0.1) 16.03 (0.1)
K magnitude
u magnitude 20.11 (0.05) 20.12 (0.06) 20.12 (0.06)
g magnitude 18.36 (0.007) 18.49 (0.007)
r magnitude 17.79 (0.005) 17.79 (0.006)
i magnitude 17.53 (0.004) 17.54 (0.006)
z magnitude 17.44 (0.005) 17.44 (0.01)
G magnitude 17.81 (0.01) 17.83 17.83 17.81 17.81 (0.003) 17.83
BP magnitude 18.28 (0.01) 18.32 18.32
RP magnitude 17.19 (0.009) 17.19 17.19
Pan g magnitude 18.36 (0.008) 18.36 (0.007) 18.36 (0.007)
Pan r magnitude 17.79 (0.006) 17.79 (0.005) 17.79 (0.005)
Pan i magnitude 17.53 (0.004) 17.53 (0.004) 17.53 (0.004)
Pan z magnitude 17.44 (0.005) 17.44 (0.005) 17.44 (0.005)
Pan y magnitude 17.42 (0.007) 17.42 (0.005) 17.42 (0.005)
E(B-V) 0.002

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit





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.