When is the best time to observe HIP 6140?

HIP 6140 is best observed from September through November, with peak visibility during October when it transits around midnight in the Northern Hemisphere.

Where is HIP 6140 located in the sky?

HIP 6140 lies in the constellation Andromeda at right ascension 01h 19m and declination +37° 23′.

What telescope do I need to split HIP 6140?

Splitting HIP 6140 requires an aperture of roughly 80 mm or larger — the components are separated by about 6.4″ at magnitudes near 6.5. The companion is about 3.1 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 6140 — Double Star in Andromeda

Magnitude 6.5^m DoubleStar Andromeda (And) Visible

Star Map + List + Plan Star Hop

Observe

1Physical Properties

Magnitude 6.46

Spectral Type A5m

Star Color Yellow-white (B-V 0.23)

Distance 408 ly

2Position & Identifiers

RA 01h 18m 47.0s

Dec +37° 23' 10.0"

Constellation Andromeda (And)

HR 379

HIP 6140

HD 7853

SAO 54592

Double Cat 1055

SIMBAD

3How easy to split?

Primary 6.5 mag Companion 9.6 mag Separation 6.4″

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.	Medium+	Medium+	Medium
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 Sep – Nov (peak: Oct)

5Multiple Star System

Separation 6.4″

Companion Mag 9.6

Position Angle 62°

Star Colors A: Yellow-white B: Yellow

Discoverer STF 108

Separation over time

Measured 1830 → 2017 (187 y)

Separation drift 5.9" → 6.4" (+0.50")

Rate +0.0027" / y

PA drift 62° → 62° (+0°, +0.000°/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.