When is the best time to observe HIP 30906?

HIP 30906 is best observed from November through January, with peak visibility during December when it transits around midnight in the Northern Hemisphere.

Where is HIP 30906 located in the sky?

HIP 30906 lies in the constellation Monoceros at right ascension 06h 29m and declination +02° 39′.

What telescope do I need to split HIP 30906?

Splitting HIP 30906 requires an aperture of roughly 60 mm or larger — the components are separated by about 19.4″ at magnitudes near 6.2. The companion is about 4.2 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 30906 — Double Star in Monoceros

Magnitude 6.2^m DoubleStar Monoceros (Mon) Visible

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Observe

1Physical Properties

Magnitude 6.16

Spectral Type gM1

Star Color Red (B-V 1.54)

2Position & Identifiers

RA 06h 29m 14.9s

Dec +02° 38' 46.0"

Constellation Monoceros (Mon)

HR 2355

HIP 30906

HD 45724

SAO 113940

SIMBAD

3How easy to split?

Primary 6.2 mag Companion 10.4 mag Separation 19.4″

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

Easy Medium Hard Very hard Impossible

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

4Visibility

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Best season Nov – Jan (peak: Dec)

5Multiple Star System

Separation 19.4″

Companion Mag 10.4

Position Angle 300°

Star Colors A: Red

Discoverer BAL1695

Separation over time

Measured 1910 → 2000 (90 y)

Separation drift 19.7" → 19.4" (-0.30")

Rate -0.0033" / y

PA drift 295° → 300° (+5°, +0.056°/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.