When is the best time to observe HIP 39225?

HIP 39225 is best observed from December through February, with peak visibility during January when it transits around midnight in the Northern Hemisphere.

Where is HIP 39225 located in the sky?

HIP 39225 lies in the constellation Carina at right ascension 08h 01m and declination -54° 31′.

What telescope do I need to split HIP 39225?

Splitting HIP 39225 requires an aperture of roughly 60 mm or larger — the components are separated by about 40.4″ at magnitudes near 6.1. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 39225 — Double Star in Carina

Magnitude 6.1^m DoubleStar Carina (Car) Visible

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Observe

1Physical Properties

Magnitude 6.10

Spectral Type B2IV-V subgiant

Star Color Blue-white (B-V -0.04)

2Position & Identifiers

RA 08h 01m 22.9s

Dec -54° 30' 54.0"

Constellation Carina (Car)

HR 3157

HIP 39225

HD 66546

SAO 235686

SIMBAD

3How easy to split?

Primary 6.1 mag Companion 7.9 mag Separation 40.4″

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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 Dec – Feb (peak: Jan)

5Multiple Star System

Separation 40.4″

Companion Mag 7.9

Position Angle 162°

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

Discoverer DUN 60

Notes

Companion B9IIIp.

Separation over time

Measured 1837 → 2015 (178 y)

Separation drift 40.4" → 40.4" (+0.00")

Rate +0.0000" / y

PA drift 160° → 162° (+2°, +0.011°/y)

Essentially fixed on human timescales — the same view your grandchildren will see.

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.