When is the best time to observe HIP 116365?

HIP 116365 is best observed from August through October, with peak visibility during September when it transits around midnight in the Northern Hemisphere.

Where is HIP 116365 located in the sky?

HIP 116365 lies in the constellation Andromeda at right ascension 23h 35m and declination +38° 01′.

What telescope do I need to split HIP 116365?

Splitting HIP 116365 requires an aperture of roughly 60 mm or larger — the components are separated by about 19.8″ at magnitudes near 6.2. The companion is about 5.6 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 116365 — Double Star in Andromeda

Magnitude 6.2^m DoubleStar Andromeda (And) Visible

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Observe

1Physical Properties

Magnitude 6.18

Spectral Type K7III giant

Star Color Red (B-V 1.58)

2Position & Identifiers

RA 23h 34m 46.7s

Dec +38° 01' 26.0"

Constellation Andromeda (And)

HR 8950

HIP 116365

HD 221776

SAO 73351

Double Cat 16843

SIMBAD

3How easy to split?

Primary 6.2 mag Companion 11.8 mag Separation 19.8″

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

Easy Medium Hard Very hard Impossible

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

4Visibility

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Best season Aug – Oct (peak: Sep)

5Multiple Star System

Separation 19.8″

Companion Mag 11.8

Position Angle 329°

Star Colors A: Red

Discoverer BU 388

Separation over time

Measured 1874 → 2002 (128 y)

Separation drift 25.0" → 19.8" (-5.20")

Rate -0.0406" / y

PA drift 340° → 329° (-11°, -0.086°/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.