Observe
1Physical Properties
Magnitude
6.56
Range
6.27 - 7.50
Variable Type
LC
Spectral Type
M0-1Iab
Star Color
Deep ruby red
(B-V 2.25)
2Position & Identifiers
RA
06h 11m 51.4s
Dec
+21° 52' 07.0"
Constellation
Gemini
(Gem)
HR
2190
HIP
29416
HD
42475
Variable ID
TV Gem
Querying VizieR catalog...
3How easy to follow?
Magnitude
6.3 – 7.5 mag
Amplitude
1.2 mag
Period
182 d
Type
LC
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard | 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)
5Comparison Stars for TV Gem (6.3–7.5)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
6
Size Comparison
Querying VizieR for stellar data…
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
Discover
14Stellar Notes
SRc 8.7 - 9.5p, 182d.
IUE observations of uv continuum suggest an early-type companion, B9 or A1III-IV.
Gem OB1.
Also classified K5.5-M1.3Iab.
Survey Image
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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.
Propus
HIP 29655; Eta Geminorum; 7 Geminorum
Tight double — a rewarding split at 1.9″
Double Star
mag 3.28
0.9°
Gemini
6 Gem
Mira-type variable, range 5.7–8.1
Variable Star
mag 6.39
1.0°
Gemini
3 Gem
Variable star, range 7.0–10.0
Variable Star
mag 5.75
1.3°
Gemini
NGC 2175
Rich open cluster
Open Cluster
mag 6.8
1.6°
Orion
TU Gem
Semi-regular variable, range 6.9–8.0
Variable Star
mag 7.30
4.2°
Gemini
Y Tau
Semi-regular variable, range 6.4–7.3
Variable Star
mag 6.95
6.2°
Taurus
M1
Crab Nebula
Supernova remnant
Supernova Remnant
mag 8.4
8.7°
Taurus
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