J18298+1114
LAMOSTJ182951.20+111441.9 · 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
Results and provenance
Fit — Bamberg
| Teff [K] | 43167 ± 1101 |
| log g | 6.090 ± 0.140 |
| log n(He)/n(H) | -1.884 ± 0.178 |
| reduced χ² | 0.989 over 746 points |
| radial velocity | -74.0 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 19:10:14 |
Observation
| source file | spec-100473-60109-27021598771503589.fits |
Gaia astrometry
| Gaia DR3 source | 4483934243439518720 |
| parallax [mas] | 0.4315 ± 0.1032 |
| G | 17.665 |
| μα [mas/yr] | -1.228 |
| μδ [mas/yr] | -3.864 |
| l, b | 40.601, 9.846 |
Published (Culpan et al. 2022)
| class (Culpan) | sdOB |
| Teff [K] | 39240 ± 657 |
| log g | 5.81 ± 0.09 |
| log y | -2.77 ± 0.26 |
| reference | 2021ApJS..256...28L |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -1.20 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -1.07 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -1.01 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.98 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.96 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.95 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.94 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.93 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -1.16 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -1.34 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -1.12 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -1.04 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -1.10 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.99 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -1.21 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 43167 K · log g 6.090 · E(44−55) 0.076 · χ²r 20.03 over 9 bands
distance 2318 pc · parallax 0.4300 ± 0.1000 mas (23%) · R 0.0616 +0.0222 −0.0137 R☉ · M 0.171 +0.148 −0.069 M☉ — below the 0.47 canonical mass · L 11.9 +10.1 −4.7 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.