48 Librae — Star in Libra
Observe
1Physical Properties
Magnitude
4.88
Range
4.74 - 4.96
Variable Type
Gamma Cassiopeiae (Eruptive Be Star)
Spectral Type
B5IIIp
bright giant
Star Color
Blue-white
(B-V -0.10)
2Position & Identifiers
RA
15h 58m 11.4s
Dec
-14° 16' 46.0"
Constellation
Libra
(Lib)
HR
5941
HIP
78207
HD
142983
SAO
159607
Flamsteed
48 Lib
Variable ID
FX Lib
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium | Hard+ |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
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Best season
Apr – Jun
(peak: May)
5Survey Image
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6
Size Comparison
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7
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8
Spectral Classification
9
Hertzsprung-Russell Diagram
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10
Stellar Lifecycle
11
Blackbody Spectrum
12
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
13
Stellar Fusion
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14Stellar Notes
Gamma Cas 4.79 - 4.96V. Variable polarization. R-I also found at -0.13.
Sco-Cen assoc.; probable member of Sco-Cen cluster; member of Pleiades group.
Strong Lambda 4619 absorption. Shell star with variable hydrogen emission profiles. Also classified B3:IV:e-shell.
Shell oscillations. Unstable circumstellar shell expanding -25k/s. RV has quasi period of about 10 yrs, amp. about | 200k/s.
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
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