TU Gem
Observable Variable Star
Fair (39/100)
Range: 6.88 - 8.0, Period: 217.0d, Type: SRB
HR 9120
VariableStar
Gem
Visible
Level 3
Medium telescope (6-8") - Monitor brightness changes
Physical Properties
Magnitude
7.30
Range
6.88 - 8.0
Period
217.000 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
C
Star Color
Red
(B-V 3.00)
Position & Identifiers
RA
06h 10m 53.0s
Dec
+26° 00' 51.0"
Constellation
Gem
HR
9120
Variable ID
TU Gem
Visibility
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Comparison Stars for TU Gem
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
0.4″
Companion Mag
9.5
Companion Sp
C2
Position Angle
100°
Star Colors
A: Red
Discoverer
TDS3609
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.4″ · PA: 100° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
Carbon star; Period 230d
Carbon star
Survey Image
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