When is the best time to observe HIP 113621?

HIP 113621 is best observed from August through October, with peak visibility during September when it transits around midnight in the Northern Hemisphere.

Where is HIP 113621 located in the sky?

HIP 113621 lies in the constellation Pegasus at right ascension 23h 01m and declination +31° 05′.

What telescope do I need to split HIP 113621?

Splitting HIP 113621 requires an aperture of roughly 100 mm or larger — the components are separated by about 3.1″ at magnitudes near 6.6. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 113621 — Double Star in Pegasus

Magnitude 6.6^m DoubleStar Pegasus (Peg) Visible

Star Map + List + Plan Star Hop

Observe

1Physical Properties

Magnitude 6.60

Spectral Type B9IIIpMn bright giant

Star Color Blue-white (B-V -0.04)

2Position & Identifiers

RA 23h 00m 42.5s

Dec +31° 04' 59.0"

Constellation Pegasus (Peg)

HR 8753

HIP 113621

HD 217477

SAO 72924

Double Cat 16443

SIMBAD

3How easy to split?

Primary 6.6 mag Companion 9.5 mag Separation 3.1″

Sign in and configure your equipment and default location to see a personalized row.

Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard+	Hard+	Hard+
150 mm Newton 150mm Newt.	Medium+	Medium+	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

Set a location in User Settings to see visibility data.

Best season Aug – Oct (peak: Sep)

5Multiple Star System

Separation 3.1″

Companion Mag 9.5

Position Angle 98°

Star Colors A: Blue-white B: Yellow

Discoverer STF2968

Notes

CPM.

Separation over time

Measured 1827 → 2022 (195 y)

Separation drift 3.0" → 3.1" (+0.10")

Rate +0.0005" / y

PA drift 92° → 98° (+6°, +0.031°/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.