J00492+6419sdO
00:49:12.27 64:19:44.83 · Culpan hotsd
χ²/N = 0.96
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] | 53825 ± 1147 |
| log g | 5.626 ± 0.058 |
| log n(He)/n(H) | -1.078 ± 0.070 |
| reduced χ² | 0.964 over 743 points |
| radial velocity | -44.0 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 19:07:14 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | MWM / mwm_cb |
| field · MJD | 102047 · 60345 |
| date | 2024-02-05 |
| catalogid | 63050394809572487 |
| exposure | 900 s in 1 |
| airmass | 1.30 |
| seeing (50%) | 1.89″ |
| E(B−V) | 0.212 |
| pipeline | v6_2_1 |
| S/N (classifier) | 31.7 |
| source file | spec-102047-60345-63050394809572487.fits |
Gaia astrometry
| Gaia DR3 source | 524017865895388544 |
| parallax [mas] | 1.3295 ± 0.0167 |
| G | 13.324 |
| BP − RP | 0.060 |
| Gabs | 3.943 |
| μα [mas/yr] | -10.125 |
| μδ [mas/yr] | 3.396 |
| RUWE | 1.076 |
| l, b | 122.690, 1.458 |
| selection | f_plx |
Classifier
NEW
auto: He II/He I 10.2, EW 1.53, Mg I b suggests a companion but Ca II does not (-0.6 sigma); CONTINUUM WAVY (0.022, typical 0.008) -- Balmer jump and continuum shape unreliable
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -0.71 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -0.64 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.60 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.58 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.57 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.56 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.56 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.55 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -0.69 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -0.79 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -0.67 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -0.62 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -0.66 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.59 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -0.72 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 53825 K · log g 5.626 · E(44−55) 0.368 · χ²r 0.40 over 39 bands
distance 752 pc · parallax 1.3300 ± 0.0200 mas (2%) · R 0.2238 +0.0036 −0.0035 R☉ · M 0.772 +0.098 −0.086 M☉ — above the 0.47 canonical mass · L 378.9 +13.5 −13.2 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.