HIP 28765 — Double Star in Auriga
Observe
1Physical Properties
Magnitude
6.45
Variable Type
Delta Scuti (Pulsating)
Spectral Type
A7III
giant
Star Color
Yellow-white
(B-V 0.18)
2Position & Identifiers
RA
06h 04m 29.1s
Dec
+51° 34' 24.0"
Constellation
Auriga
(Aur)
HR
2123
HIP
28765
HD
40873
SAO
25548
Double Cat
4633
Querying VizieR catalog...
3How easy to split?
Primary
6.5 mag
Companion
9.3 mag
Separation
39.5″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Easy | Medium+ | Medium |
| 150 mm Newton 150mm Newt. | Easy | Easy | Easy |
| Celestron C8 (203 mm SCT) C8 203mm | 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
Nov – Jan
(peak: Dec)
5Multiple Star System Triple
Components
3 (triple)
Component IDs
AB
Separation
39.5″
Companion Mag
9.3
Star Colors
A: Yellow-white
B: Yellow
BC, 9.0, 10.0v, sep. 0.6", CPM with A.
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 6.5 · B: 9.3 · Sep: 39.5″ · 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
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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
Discover
14Stellar Notes
Delta Sct?
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 2126
Open cluster
Open Cluster
mag 10.0
1.7°
Auriga
Psi Aur
HIP 30520; Psi1 Aurigae; 46 Aurigae
Semi-regular variable, range 4.8–5.7
Variable Star
mag 4.91
4.0°
Auriga
NGC 2128
Elliptical galaxy
Galaxy
mag 13.0
6.1°
Camelopardalis
12 Lyn
Tight double — a rewarding split at 1.9″
Double Star
mag 4.87
9.8°
Lynx
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