When is the best time to observe HIP 17858?

HIP 17858 is best observed from October through December, with peak visibility during November when it transits around midnight in the Northern Hemisphere.

Where is HIP 17858 located in the sky?

HIP 17858 lies in the constellation Camelopardalis at right ascension 03h 49m and declination +57° 07′.

What telescope do I need to split HIP 17858?

Splitting HIP 17858 requires an aperture of roughly 60 mm or larger — the components are separated by about 58.3″ at magnitudes near 6.5. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 17858 — Double Star in Camelopardalis

Magnitude 6.5^m DoubleStar Camelopardalis (Cam) Visible

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Observe

1Physical Properties

Magnitude 6.46

Spectral Type A0Vn

Star Color Blue-white (B-V 0.06)

2Position & Identifiers

RA 03h 49m 19.6s

Dec +57° 07' 05.0"

Constellation Camelopardalis (Cam)

HR 1161

HIP 17858

HD 23594

SAO 24244

SIMBAD

3How easy to split?

Primary 6.5 mag Companion 7.2 mag Separation 58.3″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Easy	Easy	Easy
150 mm Newton 150mm Newt.	Easy	Easy	Easy
Celestron C8 (203 mm SCT) C8 203mm	Easy	Easy	Easy

Easy Medium Hard Very hard Impossible

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

4Visibility

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Best season Oct – Dec (peak: Nov)

5Multiple Star System

Separation 58.3″

Companion Mag 7.2

Companion Sp A0V

Position Angle 76°

Star Colors A: Blue-white B: Blue-white

Discoverer S 436

Separation over time

Measured 1790 → 2019 (229 y)

Separation drift 59.7" → 58.3" (-1.40")

Rate -0.0061" / y

PA drift 76° → 76° (+0°, +0.000°/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.