HIP 90981 — Double Star in Pavo
Observe
1Physical Properties
Magnitude
6.44
Spectral Type
G5IV
subgiant
Star Color
Orange
(B-V 0.68)
2Position & Identifiers
RA
18h 33m 29.5s
Dec
-58° 42' 33.0"
Constellation
Pavo
(Pav)
HR
6939
HIP
90981
HD
170525
SAO
245547
Querying VizieR catalog...
3How easy to split?
Primary
6.4 mag
Companion
10.6 mag
Separation
1.2″
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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 450 mm reflector.
4Visibility
Set a location in User Settings to see visibility data.
Best season
May – Jul
(peak: Jun)
5Multiple Star System
Separation
1.2″
Companion Mag
10.6
Position Angle
196°
Star Colors
A: Orange
B: Red
Discoverer
HDS2633
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 6.4 · B: 10.6 · Sep: 1.2″ · PA: 196° · N up, E right
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
Explore
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
Discover
14Stellar Notes
Wolf 630 group.
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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