6 Geminorum — Variable Star in Gemini
Excellent (66/100)
Observe
1Physical Properties
Magnitude
6.39
Range
5.74 - 7.4
Period
460 days
Variable Type
Semi-Regular Variable (Supergiant)
Spectral Type
M1-2Ia-Iab
Star Color
Red
(B-V 2.24)
(reddened by dust)
Distance
1,087 ly
2Position & Identifiers
RA
06h 12m 19.1s
Dec
+22° 54' 30.0"
Constellation
Gemini
(Gem)
HR
2197
HIP
29450
HD
42543
SAO
78098
Flamsteed
6 Gem
Variable ID
BU Gem
Querying VizieR catalog...
3How easy to follow?
Magnitude
5.7 – 8.1 mag
Amplitude
2.4 mag
Period
460 d
Type
SRC
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Imp. | Imp. | Imp. |
| 50 mm finder 50mm finder | Easy | Medium+ | Medium+ |
| 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
Nov – Jan
(peak: Dec)
5Survey Image
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6Light Curve
7Comparison Stars for 6 Gem (5.7–8.1)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
8
Size Comparison
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9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
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12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
Discover
16Stellar Notes
Lc? 5.74 - 8.1V, possibly E, per. 32y.
About 600d.
Gem OB1.
17
Light Travel Time Machine
18
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.
3 Gem
Variable star, range 7.0–10.0
Variable Star
mag 5.75
0.6°
Gemini
Propus
HIP 29655; Eta Geminorum; 7 Geminorum
Tight double — a rewarding split at 1.9″
Double Star
mag 3.28
0.7°
Gemini
TV Gem
Variable star, range 6.3–7.5
Variable Star
mag 6.56
1.0°
Gemini
Collinder 89
Open cluster
Open Cluster
mag 5.7
1.5°
Gemini
TU Gem
Semi-regular variable, range 6.9–8.0
Variable Star
mag 7.30
3.1°
Gemini
Y Tau
Semi-regular variable, range 6.4–7.3
Variable Star
mag 6.95
6.6°
Taurus
M1
Crab Nebula
Supernova remnant
Supernova Remnant
mag 8.4
8.8°
Taurus
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