J00579+6628sdO
00:57:55.90 66:28:37.13 · Culpan hotsd
χ²/N = 0.94
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] | 41671 ± 528 |
| log g | 5.887 ± 0.073 |
| log n(He)/n(H) | -2.247 ± 0.228 |
| reduced χ² | 0.937 over 748 points |
| radial velocity | -71.0 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 19:07:15 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | MWM / mwm_cb |
| field · MJD | 102050 · 60542 |
| date | 2024-08-20 |
| catalogid | 63050394810330291 |
| exposure | 730 s in 1 |
| airmass | 1.28 |
| seeing (50%) | 2.80″ |
| E(B−V) | 0.173 |
| pipeline | v6_2_1 |
| cosmic rays | 3 pixels cancelled |
| S/N (classifier) | 28.6 |
| source file | spec-102050-60542-63050394810330291.fits |
Gaia astrometry
| Gaia DR3 source | 526027704427130496 |
| parallax [mas] | 1.8012 ± 0.0199 |
| G | 14.043 |
| BP − RP | -0.059 |
| Gabs | 5.321 |
| μα [mas/yr] | 22.233 |
| μδ [mas/yr] | -3.387 |
| RUWE | 0.996 |
| l, b | 123.581, 3.613 |
| selection | f_plx |
Classifier
NEW
auto: He II/He I 7.0, EW 1.05, Mg I b suggests a companion but Ca II does not (-0.8 sigma)
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -1.15 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -1.03 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.97 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.94 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.92 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.91 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.90 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.89 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -1.11 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -1.28 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -1.08 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -0.99 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -1.06 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.95 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -1.17 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 41671 K · log g 5.887 · E(44−55) 0.266 · χ²r 0.50 over 42 bands
distance 555 pc · parallax 1.8000 ± 0.0200 mas (1%) · R 0.1196 +0.0018 −0.0017 R☉ · M 0.402 +0.051 −0.045 M☉ — below the 0.47 canonical mass · L 38.8 +1.4 −1.3 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.