HIP 45858 — Double Star in Lynx

Magnitude 6.1^m DoubleStar Lynx (Lyn) Visible

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Observe

1Physical Properties

Magnitude 6.12

Spectral Type F2V+F4V

Star Color Yellow-white (B-V 0.38)

Distance 181 ly

2Position & Identifiers

RA 09h 20m 59.3s

Dec +38° 11' 18.0"

Constellation Lynx (Lyn)

HR 3701

HIP 45858

HD 80441

SAO 61411

Double Cat 7307

3How easy to split?

Primary 6.1 mag Companion 7.1 mag Separation 1.2″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	V. hard+	V. hard+	V. hard+
150 mm Newton 150mm Newt.	Hard+	Hard+	Hard+
Celestron C8 (203 mm SCT) 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 Jan – Mar (peak: Feb)

5Multiple Star System Triple

Components 3 (triple)

Component IDs AB

Separation 1.2″

Companion Mag 7.1

Companion Sp F4V

Position Angle 319°

Star Colors A: Yellow-white B: Yellow-white

Discoverer STF1338

Notes

AB 6.50 F3V, 6.74, 389.05y, a = 1.516".

Separation over time

Period: 381.5 y Eccentricity: 0.202 Now: 1.2", PA 323° + 0.03" in 5 years

Apparent separation over time, computed from ORB6 orbital elements. Steep curves indicate fast-changing pairs — catch them while they're splittable.

Eyepiece View

Telescope Eyepiece

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80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

A: 6.1 · B: 7.1 · Sep: 1.2″ · PA: 319° · 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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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

15

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.

Tight double — a rewarding split at 2.6″

Double Star mag 3.82 1.4° Lynx

Bright spiral galaxy

Galaxy mag 11.5 2.3° Lynx

Easy double, sep 4.5″

Double Star mag 5.82 7.2° Cancer

Semi-regular variable, range 5.3–6.9

Variable Star mag 5.95 7.5° Cancer

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