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HIP 34995 — Double Star in Gemini

Magnitude 6.9m DoubleStar Gemini (Gem) Visible
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1Physical Properties

Magnitude 6.89
Spectral Type A1pSrCr
Star Color White (B-V -0.03)

2Position & Identifiers

RA 07h 14m 26.6s
Dec +24° 42' 39.0"
Constellation Gemini (Gem)
HR 2722
HIP 34995
HD 55579
SAO 79191

3How easy to split?

Primary 6.9 mag Companion 11.5 mag Separation 126.9″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Hard Hard V. hard+
150mm Newt. Medium+ Medium Hard+
C8 203mm Medium+ Medium+ Medium
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

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Best season Dec – Feb (peak: Jan)

5Multiple Star System Quadruple C,E: optical

Components 4 (quadruple)
Component IDs AB
Separation 126.9″
Companion Mag 11.5
Position Angle 109°
Star Colors A: White B: Yellow
Discoverer ENG 30

Separation over time

Measured 1886 → 2015 (129 y)
Separation drift 127.5" → 126.9" (-0.60")
Rate -0.0047" / y
PA drift 108° → 109° (+1°, +0.008°/y)

Slow change over generations — observable in lifetime comparisons.

Measured from the WDS observational archive. No orbital solution has been derived — most likely the period is too long to fit an orbit to the available measurement arc.

Eyepiece View

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80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 109°

A: 6.9 · B: 11.5 · Sep: 126.9″ · PA: 109° · N up, E right

Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

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Size Comparison

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Spectral Classification

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Hertzsprung-Russell Diagram

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Stellar Lifecycle

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Blackbody Spectrum

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Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

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Stellar Fusion

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