HIP 63688 — Double Star in Musca
Observe
1Physical Properties
Magnitude
6.03
Range
5.85 - 6.13
Variable Type
Gamma Cassiopeiae (Eruptive Be Star)
Spectral Type
B1.5IIIne
bright giant
Star Color
White
(B-V 0.05)
2Position & Identifiers
RA
13h 03m 05.2s
Dec
-71° 28' 34.0"
Constellation
Musca
(Mus)
HR
4930
HIP
63688
HD
113120
SAO
257003
Querying VizieR catalog...
3How easy to split?
Primary
6.0 mag
Companion
8.6 mag
Separation
0.6″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | V. hard | V. hard | V. hard |
| 150 mm Newton 150mm Newt. | V. hard+ | V. hard+ | V. hard+ |
| Celestron C8 (203 mm SCT) C8 203mm | V. hard+ | V. hard+ | V. hard+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
To reach "Medium" at Bortle 3, you'd need at least a 460 mm reflector.
4Visibility
Set a location in User Settings to see visibility data.
Best season
Mar – May
(peak: Apr)
5Multiple Star System
Separation
0.6″
Companion Mag
8.6
Position Angle
163°
Star Colors
A: White
B: Yellow
Discoverer
CHR 228
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 6.0 · B: 8.6 · Sep: 0.6″ · PA: 163° · N up, E right
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
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6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
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
6.02 - 6.17V. Miscellaneous magnitude determinations range from 5.93 to 6.132V, probably confirming variability. Also | suspect amp. 0.03V on time scale 2 hrs.
Line width of H alpha emission variable.
Variable emission-line velocity. vsini 300k/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.
C105
NGC 4833
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 7.4
0.7°
Musca
R Mus
Pulsating variable, period 7.5d
Variable Star
mag 6.33
2.7°
Musca
Collinder 261
Open cluster
Open Cluster
mag 9.0
3.8°
Musca
Theta Mus
Easy double, sep 5.2″
Double Star
mag 5.51
6.2°
Musca
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