HIP 103652 — Double Star in Equuleus
Observe
1Physical Properties
Magnitude
5.99
Spectral Type
F1Vp
Star Color
Yellow-white
(B-V 0.26)
Distance
362 ly
2Position & Identifiers
RA
21h 00m 03.9s
Dec
+07° 30' 59.0"
Constellation
Equuleus
(Equ)
HR
8038
HIP
103652
HD
199942
SAO
126447
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3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard+ | Hard | V. 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
Set a location in User Settings to see visibility data.
Best season
Jul – Sep
(peak: Aug)
5Multiple Star System
Separation
0.2″
Companion Mag
8.1
Position Angle
191°
Star Colors
A: Yellow-white
B: Yellow
Discoverer
KUI 102
6.3 A5V, 7.6 F4V, 52.5y, a = 0.27".
Separation over time
Period: 59.2 y
Eccentricity: 0.266
Now: 0.24", PA 164°
-0.02" in 5 years
Apparent separation over time, computed from ORB6 orbital elements. Steep curves indicate fast-changing pairs — catch them while they're splittable.
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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
Weak-lined spectrum. Metallic lines give A8; CH, F1.
15
Light Travel Time Machine
16
Relativistic Travel
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.
13 Del
Tight double — a rewarding split at 1.5″
Double Star
mag 5.58
3.4°
Delphinus
Kappa Del
Easy double, sep 214.6″
Double Star
mag 5.05
5.8°
Delphinus
NGC 6934
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.9
6.4°
Delphinus
NGC 6962
Bright spiral galaxy
Galaxy
mag 12.0
7.9°
Aquarius
Gamma Del
HIP 102532; Gamma2 Delphini; 12 Delphini
Colorful double, sep 8.8″
Double Star
mag 4.27
9.2°
Delphinus
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