Upsilon Sgr
HIP 95176; Upsilon Sgr; 46 Sgr
Star
Sgr
Visible
Level 2
Small telescope (4")
Physical Properties
Magnitude
4.61
Range
4.43 - 4.65
Period
138 days
Variable Type
E+SPB:+PVTELI:
Spectral Type
B2Vpe+A2IaShell
Star Color
White
(B-V 0.10)
Position & Identifiers
RA
19h 21m 43.6s
Dec
-15° 57' 18.0"
Constellation
Sgr
HR
7342
HIP
95176
Bayer
Upsilon
Flamsteed
46 Sgr
Variable ID
Ups Sgr
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Light Curve
Multiple Star System
Separation
0.0″
Companion Mag
7.8
Position Angle
29°
Star Colors
A: White
Discoverer
NOI 7
Size Comparison
Querying VizieR for stellar data…
Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
Loading HR diagram…
Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Fusion
Stellar Notes
EB 4.34 - 4.44p, 137.939d. Irregularities in light variation. Variable polarization, probably due to circumstellar | dust.
4.8, 5.8v, sep. 0.011", 137.9567d, K 49.1k/s, V0 +13.3k/s, asini 93.0. Analysis of IUE data by Dudley and | Jeffery (1990, MNRAS, 247, 400) gives a K2 velocity of 29.7k/s and a mass ratio of 0.63+/-0.01, indicating that | upsilon Sgr is a strong candidate as a progenitor of a type Ib supernova.
Large IR excess.
Hydrogen deficient, strong carbon? Also classified B8+F2p, B8I, F0Ia, and Apep + O9V. H alpha variable.
Survey Image
Loading survey image…