When is the best time to observe HIP 31977?

HIP 31977 is best observed from November through January, with peak visibility during December when it transits around midnight in the Northern Hemisphere.

Where is HIP 31977 located in the sky?

HIP 31977 lies in the constellation Volans at right ascension 06h 41m and declination -71° 47′.

What telescope do I need to split HIP 31977?

Splitting HIP 31977 requires an aperture of roughly 60 mm or larger — the components are separated by about 17.3″ at magnitudes near 6.5. The companion is about 3.5 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 31977 — Double Star in Volans

Magnitude 6.5^m DoubleStar Volans (Vol) Visible

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Observe

1Physical Properties

Magnitude 6.51

Spectral Type K1IIICNII giant

Star Color Orange (B-V 1.11)

2Position & Identifiers

RA 06h 40m 57.8s

Dec -71° 46' 32.0"

Constellation Volans (Vol)

HR 2505

HIP 31977

HD 49268

SAO 256326

SIMBAD

3How easy to split?

Primary 6.5 mag Companion 10.0 mag Separation 17.3″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Medium+	Medium	Hard+
150 mm Newton 150mm Newt.	Easy	Easy	Medium+
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 Nov – Jan (peak: Dec)

5Multiple Star System C: optical

Separation 17.3″

Companion Mag 10.0

Position Angle 333°

Star Colors A: Orange

Discoverer I 351

Separation over time

Measured 1893 → 2015 (122 y)

Separation drift 10.5" → 17.3" (+6.80")

Rate +0.0557" / y

PA drift 332° → 333° (+1°, +0.008°/y)

Apparent motion is significant on a human timescale — worth revisiting in a decade.

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.