When is the best time to observe HIP 115245?

HIP 115245 is best observed from August through October, with peak visibility during September when it transits around midnight in the Northern Hemisphere.

Where is HIP 115245 located in the sky?

HIP 115245 lies in the constellation Cassiopeia at right ascension 23h 21m and declination +62° 13′.

What telescope do I need to split HIP 115245?

Splitting HIP 115245 requires an aperture of roughly 60 mm or larger — the components are separated by about 13.2″ at magnitudes near 6.4. The companion is about 5.2 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 115245 — Double Star in Cassiopeia

Magnitude 6.4^m DoubleStar Cassiopeia (Cas) Visible

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Observe

1Physical Properties

Magnitude 6.39

Spectral Type K2III giant

Star Color Red (B-V 1.61)

2Position & Identifiers

RA 23h 20m 34.6s

Dec +62° 12' 47.0"

Constellation Cassiopeia (Cas)

HR 8886

HIP 115245

HD 220130

SAO 20572

Double Cat 16690

SIMBAD

3How easy to split?

Primary 6.4 mag Companion 11.6 mag Separation 13.2″

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

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 Quadruple C: optical

Components 4 (quadruple)

Component IDs AB

Separation 13.2″

Companion Mag 11.6

Position Angle 175°

Star Colors A: Red

Discoverer BU 278

Separation over time

Measured 1876 → 2016 (140 y)

Separation drift 14.6" → 13.2" (-1.40")

Rate -0.0100" / y

PA drift 171° → 175° (+4°, +0.029°/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.