J08280+4040
SDSSJ082802.03+404008.9 · Culpan knownhsd
χ²/N = 1.00
Spectrum
shaded: the intervals the fit used · │ a cancelled pixeldrag on either panel to zoom · dbl-click or Esc to reset · arrows to pan
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] | 46086 ± 886 |
| log g | 5.771 ± 0.073 |
| log n(He)/n(H) | -2.095 ± 0.106 |
| reduced χ² | 1.003 over 744 points |
| radial velocity | 91.0 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 19:07:55 |
Observation
| source file | spec-3808-55513-0338.fits |
Gaia astrometry
| Gaia DR3 source | 914500864915422848 |
| parallax [mas] | 0.1681 ± 0.1416 |
| G | 17.915 |
| μα [mas/yr] | 0.846 |
| μδ [mas/yr] | -4.770 |
| l, b | 180.575, 34.983 |
Published (Culpan et al. 2022)
| class (Culpan) | sdO |
| class (SIMBAD) | sdO |
| Teff [K] | 49800 ± 1700 |
| log g | 5.36 ± 0.08 |
| log y | -1.30 ± 0.40 |
| reference | Geierprep |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | 1.48 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | 1.32 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | 1.25 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | 1.21 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | 1.18 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | 1.16 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | 1.15 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | 1.14 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | 1.42 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | 1.64 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | 1.38 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | 1.27 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | 1.36 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | 1.22 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | 1.49 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 46086 K · log g 5.771 · E(44−55) 0.018 · χ²r 0.60 over 9 bands
distance 5949 pc · parallax 0.1700 ± 0.1400 mas (82%) · R 0.1261 +0.1862 −0.0518 R☉ · M 0.342 +1.784 −0.224 M☉ · L 64.7 +332.0 −42.3 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.