J12144+5502sdO
SBSS1212+553 · 12:14:24.82 55:02:26.12 · Culpan knownhsd
χ²/N = 0.99
Spectrum
The whole reduced spectrum above, the region marked on it below. Shaded bands are the intervals the fit used; a tick under the axis marks a pixel the rejection mask cancelled.
Line-profile fit — Bamberg
Results and provenance
Fit — Bamberg
| Teff [K] | 53485 ± 1415 |
| log g | 6.461 ± 0.092 |
| log n(He)/n(H) | -1.504 ± 0.115 |
| reduced χ² | 0.990 over 745 points |
| radial velocity | -25.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 15 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 19:08:44 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | boss |
| date | 2013-05-01 |
| exposure | 2703 s in 6 |
| pipeline | v5_13_2 |
| S/N (classifier) | 38.4 |
| source file | spec-6833-56413-0483.fits |
Gaia astrometry
| Gaia DR3 source | 1573490719481398016 |
| parallax [mas] | 0.3381 ± 0.0654 |
| G | 16.808 |
| Gabs | 4.450 |
| μα [mas/yr] | -7.521 |
| μδ [mas/yr] | -10.178 |
| l, b | 133.992, 61.286 |
Published (Culpan et al. 2022)
| class (Culpan) | sdO |
| class (SIMBAD) | sdO |
| Teff [K] | 59354 ± 6000 |
| log g | 5.57 ± 0.20 |
| log y | -1.63 ± 0.40 |
| reference | 2009PhDT.......273H |
Classifier
AGREES
fitted Teff 59354 logg 5.57 logY -1.63 2009PhDT.......273H
auto: He II/He I 8.1, EW 1.21, Mg I b suggests a companion but Ca II does not (-0.2 sigma)
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -0.41 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -0.36 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.34 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.33 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.32 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.32 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.32 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.31 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -0.39 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -0.45 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -0.38 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -0.35 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -0.37 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.34 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -0.41 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 53485 K · log g 6.461 · E(44−55) 0.012 · χ²r 0.14 over 32 bands
distance 2958 pc · parallax 0.3400 ± 0.0700 mas (21%) · R 0.1069 +0.0259 −0.0173 R☉ · M 1.208 +0.685 −0.377 M☉ — above the 0.47 canonical mass · L 84.3 +45.7 −25.2 L☉
Photometry against the model, with the residual beneath it in units of the error. The horizontal bar on each point is the passband, not an error; a hollow point was not fitted and the tooltip says why. Drag a box to zoom, double-click or Esc to come back out.