J22522+0041
SDSSJ225215.93+004155.9 · Culpan knownhsd
χ²/N = 0.99
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
Line-profile fit — uli
Results and provenance
Fit — Bamberg
| Teff [K] | 35280 ± 185 |
| log g | 5.868 ± 0.030 |
| log n(He)/n(H) | -1.492 ± 0.038 |
| reduced χ² | 0.993 over 640 points |
| radial velocity | -30.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 12 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 19:11:00 |
Fit — uli
| Teff [K] | 34573 ± 139 |
| log g | 5.786 ± 0.032 |
| log n(He)/n(H) | -1.443 ± 0.046 |
| reduced χ² | 0.990 over 640 points |
| radial velocity | -30.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 12 |
| grids | h667.grid h909.grid h97.grid h99.grid +1 more |
| fitted | 04/09/2026 18:37:35 |
Observation
| source file | spec-4206-55471-0701.fits |
Gaia astrometry
| Gaia DR3 source | 2654982073232140544 |
| parallax [mas] | 0.3442 ± 0.0802 |
| G | 16.727 |
| μα [mas/yr] | -4.687 |
| μδ [mas/yr] | -4.355 |
| l, b | 72.224, -50.062 |
Published (Culpan et al. 2022)
| class (Culpan) | sdOB |
| class (SIMBAD) | DAO |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -0.49 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -0.43 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.41 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.40 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.39 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.38 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.38 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.38 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -0.47 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | -0.45 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.40 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -0.49 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 35280 K · log g 5.868 · E(44−55) 0.100 · χ²r 0.48 over 15 bands
distance 2905 pc · parallax 0.3400 ± 0.0800 mas (24%) · R 0.1628 +0.0498 −0.0307 R☉ · M 0.714 +0.522 −0.252 M☉ · L 37.0 +26.1 −12.7 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.