When is the best time to observe HIP 27787?

HIP 27787 is best observed from November through January, with peak visibility during December when it transits around midnight in the Northern Hemisphere.

Where is HIP 27787 located in the sky?

HIP 27787 lies in the constellation Columba at right ascension 05h 53m and declination -38° 32′.

What telescope do I need to split HIP 27787?

Splitting HIP 27787 requires an aperture of roughly 260 mm or larger — the components are separated by about 1.3″ at magnitudes near 6.7. The companion is about 3.1 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 27787 — Double Star in Columba

Magnitude 6.7^m DoubleStar Columba (Col) Visible

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Observe

1Physical Properties

Magnitude 6.70

Spectral Type K1III giant

Star Color Orange (B-V 1.08)

Distance 1,087 ly

2Position & Identifiers

RA 05h 52m 47.7s

Dec -38° 31' 33.0"

Constellation Columba (Col)

HR 2055

HIP 27787

HD 39752

SAO 196274

SIMBAD

3How easy to split?

Primary 6.7 mag Companion 9.8 mag Separation 1.3″

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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	Hard	Hard	Hard

Easy Medium Hard Very hard Impossible

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

To reach "Medium" at Bortle 3, you'd need at least a 260 mm reflector.

4Visibility

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Best season Nov – Jan (peak: Dec)

5Multiple Star System

Separation 1.3″

Companion Mag 9.8

Position Angle 125°

Star Colors A: Orange

Discoverer I 16

Separation over time

Measured 1894 → 2016 (122 y)

Separation drift 1.0" → 1.3" (+0.30")

Rate +0.0025" / y

PA drift 110° → 125° (+15°, +0.123°/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.