Nahn — Double Star in Cancer
HIP 44946; Xi Cancri; 77 Cancri
Observe
1Physical Properties
Magnitude
5.14
Spectral Type
G9IIIFe-1CH-0.5
giant
Star Color
Orange
(B-V 0.97)
2Position & Identifiers
RA
09h 09m 21.5s
Dec
+22° 02' 44.0"
Constellation
Cancer
(Cnc)
HR
3627
HIP
44946
HD
78515
SAO
80666
Bayer
Xi
Flamsteed
77 Cnc
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3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium | Hard+ | 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
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Best season
Jan – Mar
(peak: Feb)
5Multiple Star System
Separation
0.2″
Companion Mag
6.2
Position Angle
108°
Star Colors
A: Orange
Discoverer
WRH 16
Unresolved by speckle interferometry.
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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
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14Stellar Notes
1700.76d, K 4.4k/s, V0 -7.7k/s, asini 103.
Also classified K0III.
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 2764
Bright spiral galaxy
Galaxy
mag 12.7
0.6°
Cancer
T Cnc
Mira-type variable, range 7.6–10.5
Variable Star
mag 7.60
3.7°
Cancer
M44
Beehive Cluster or Praesepe
Scattered bright open cluster
Open Cluster
mag 3.7
7.1°
Cancer
62 Cnc
Easy double, sep 975.6″
Double Star
mag 5.20
7.3°
Cancer
Iota Cnc
HIP 43103; Iota Cancri; 48 Cancri
Colorful double, sep 30.6″
Double Star
mag 4.02
8.4°
Cancer
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