When is the best time to observe HIP 27766?

HIP 27766 is best observed from November through January, with peak visibility during December when it transits around midnight in the Northern Hemisphere.

Where is HIP 27766 located in the sky?

HIP 27766 lies in the constellation Columba at right ascension 05h 53m and declination -37° 38′.

What telescope do I need to split HIP 27766?

Splitting HIP 27766 requires an aperture of roughly 60 mm or larger — the components are separated by about 15.5″ at magnitudes near 5.6. The companion is about 5.4 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 27766 — Double Star in Columba

Magnitude 5.6^m DoubleStar Columba (Col) Visible

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Observe

1Physical Properties

Magnitude 5.63

Spectral Type K1III giant

Star Color Orange (B-V 1.04)

2Position & Identifiers

RA 05h 52m 33.2s

Dec -37° 37' 52.0"

Constellation Columba (Col)

HR 2053

HIP 27766

HD 39720

SAO 196266

SIMBAD

3How easy to split?

Primary 5.6 mag Companion 11.0 mag Separation 15.5″

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

Easy Medium Hard Very hard Impossible

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

4Visibility

Set a location in User Settings to see visibility data.

Best season Nov – Jan (peak: Dec)

5Multiple Star System Triple optical

Components 3 (triple)

Component IDs AB

Separation 15.5″

Companion Mag 11.0

Position Angle 270°

Star Colors A: Orange

Discoverer I 64

Notes

AB optical. C, 12v at 45".

Separation over time

Measured 1896 → 2012 (116 y)

Separation drift 15.0" → 15.5" (+0.50")

Rate +0.0043" / y

PA drift 240° → 270° (+30°, +0.259°/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.