HIP 90238 — Double Star in Scutum
Observe
1Physical Properties
Magnitude
6.31
Spectral Type
K0
Star Color
Orange
(B-V 1.16)
(reddened by dust)
2Position & Identifiers
RA
18h 24m 42.1s
Dec
-07° 04' 31.0"
Constellation
Scutum
(Sct)
HR
6892
HIP
90238
HD
169370
SAO
142288
Querying VizieR catalog...
3How easy to split?
Primary
6.3 mag
Companion
11.9 mag
Separation
4.0″
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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. | Hard | Hard | Hard |
| Celestron C8 (203 mm SCT) C8 203mm | Hard+ | Hard+ | 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 240 mm reflector.
4Visibility
Set a location in User Settings to see visibility data.
Best season
May – Jul
(peak: Jun)
5Multiple Star System
Separation
4.0″
Companion Mag
11.9
Star Colors
A: Orange
(reddened by dust)
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 6.3 · B: 11.9 · Sep: 4.0″ · PA: ? · N up, E right
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
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6
Size Comparison
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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
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.
NGC 6664
Open cluster
Open Cluster
mag 7.8
3.2°
Scutum
IC 1287
Reflection nebula around a bright star
Reflection Nebula
mag 6.10
4.1°
Scutum
NGC 6539
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 9.6
5.0°
Serpens
Tau Oph
HIP 88404; Tau Ophiuchi; 69 Ophiuchi
Tight double — a rewarding split at 1.4″
Double Star
mag 5.24
5.5°
Ophiuchus
59 Ser
Easy double, sep 3.9″
Double Star
mag 5.21
7.3°
Serpens
5 Aql
Easy double, sep 12.5″
Double Star
mag 5.90
8.2°
Aquila
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