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HIP 37701 — Double Star in Lynx

Magnitude 5.3m DoubleStar Lynx (Lyn) Visible
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1Physical Properties

Magnitude 5.27
Spectral Type A0IIIn bright giant
Star Color White (B-V 0.00)
Distance 217 ly

2Position & Identifiers

RA 07h 44m 04.2s
Dec +50° 26' 02.0"
Constellation Lynx (Lyn)
HR 2969
HIP 37701
HD 61931
SAO 26488
SIMBAD

3How easy to split?

Primary 5.3 mag Companion 8.4 mag Separation 1.0″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. V. hard V. hard V. hard
150mm Newt. V. hard+ V. hard+ V. hard+
C8 203mm Hard Hard Hard
Easy Medium Hard Very hard Impossible

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

To reach "Medium" at Bortle 3, you'd need at least a 360 mm reflector.

4Visibility

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Best season Dec – Feb (peak: Jan)

5Multiple Star System

Separation 1.0″
Companion Mag 8.4
Position Angle 165°
Star Colors A: White B: Yellow
Discoverer COU2607

Eyepiece View

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80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 165°

A: 5.3 · B: 8.4 · Sep: 1.0″ · PA: 165° · N up, E right

Unresolved · 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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Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map
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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

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14

Light Travel Time Machine

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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.

NGC 2541
Hard+
Bright spiral galaxy
Galaxy mag 11.8 5.1° Lynx
Y Lyn
Easy
Semi-regular variable, range 6.6–8.2
Variable Star mag 6.20 5.2° Lynx
19 Lyn
Easy
Easy double, sep 13.8″
Double Star mag 5.45 5.8° Lynx
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