When is the best time to observe HIP 101235?

HIP 101235 is best observed from June through August, with peak visibility during July when it transits around midnight in the Northern Hemisphere.

Where is HIP 101235 located in the sky?

HIP 101235 lies in the constellation Delphinus at right ascension 20h 31m and declination +11° 16′.

What telescope do I need to split HIP 101235?

Splitting HIP 101235 requires an aperture of roughly 60 mm or larger — the components are separated by about 17.8″ at magnitudes near 7.1. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 101235 — Double Star in Delphinus

Magnitude 7.1^m DoubleStar Delphinus (Del) Visible

Star Map + List + Plan Star Hop

Observe

1Physical Properties

Magnitude 7.11

Spectral Type B8V

Star Color Blue-white (B-V 0.03)

2Position & Identifiers

RA 20h 31m 13.0s

Dec +11° 15' 38.0"

Constellation Delphinus (Del)

HR 7840

HIP 101235

HD 195483

SAO 106196

Double Cat 13946

SIMBAD

3How easy to split?

Primary 7.1 mag Companion 7.4 mag Separation 17.8″

Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Easy	Easy	Easy
150 mm Newton 150mm Newt.	Easy	Easy	Easy
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 Jun – Aug (peak: Jul)

5Multiple Star System Quadruple

Components 4 (quadruple)

Component IDs AxBC

Separation 17.8″

Companion Mag 7.4

Position Angle 255°

Star Colors A: Blue-white C: White

Notes

BC 7.5, 7.6v, Am, measured sep. 0.108" on 1985.5 by speckle interferometry, vsini 63k/s. A, optical, with companion, | measured sep. 1985.5 Aa = 0.341" by speckle interferometry.