Propus
HIP 29655; Eta Gem; 7 Gem
Observable Double Star
Fair (31/100)
Sep: 1.9", Companion: mag 6.2
HIP 29655; Eta Gem; 7 Gem
DoubleStar
Gem
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
3.28
Range
3.1 - 3.7
Period
2979.000 days
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
M2IIIa
Star Color
Red
(B-V 1.60)
Distance
375.1 ly
Position & Identifiers
RA
06h 14m 52.6s
Dec
+22° 30' 24.0"
Constellation
Gem
HR
2216
HIP
29655
Bayer
Eta
Flamsteed
7 Gem
Variable ID
Eta Gem
Double Cat
4841
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Visibility
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Light Curve
Multiple Star System
Components
3
Component IDs
O
Separation
1.9″
Companion Mag
6.2
Position Angle
256°
Star Colors
A: Red
Discoverer
BU 1008
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 1.9″ · PA: 256° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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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
ADS 4841A, SRa + EA 3.15 - 3.9v, 232.9d. Deepest min. satisfy SB period 2984d.
AB, 473.7y, a = 1.08". B is 8.8v at 1.4". A is suspected occultation double, 3.4, 5.4v, sep. 0.03". Masses A, 12.4; | B, 5.5 solar. The three components are surrounded by a gaseous envelope.
ADS 4841A 2983d, K 8.8k/s, V0 +17.6k/s, asini 306. Unresolved by speckle interferometry 1982.17 and 1983.93.
0.007".
Propus; Praepes; Tejat Prior.
Survey Image
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