When is the best time to observe 30 Arietis?

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

Where is 30 Arietis located in the sky?

30 Arietis lies in the constellation Aries at right ascension 02h 37m and declination +24° 39′.

What telescope do I need to split 30 Arietis?

Splitting 30 Arietis requires an aperture of roughly 60 mm or larger — the components are separated by about 37.9″ at magnitudes near 6.5. Larger apertures and steady seeing help resolve the pair cleanly.

30 Arietis — Double Star in Aries

Magnitude 6.5^m DoubleStar Aries (Ari) Visible

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Observe

1Physical Properties

Magnitude 6.50

Spectral Type F6III giant

Star Color Yellow-white (B-V 0.41)

Distance 181 ly

2Position & Identifiers

RA 02h 37m 00.5s

Dec +24° 38' 51.0"

Constellation Aries (Ari)

HR 765

HIP 12189

HD 16246

SAO 75471

Flamsteed 30 Ari

Double Cat 1982

SIMBAD

3How easy to split?

Primary 6.5 mag Companion 7.0 mag Separation 37.9″

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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

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Best season Sep – Nov (peak: Oct)

5Multiple Star System

Separation 37.9″

Companion Mag 7.0

Companion Sp F7V

Position Angle 275°

Star Colors A: Yellow-white B: Yellow

Discoverer STFA 5

Notes

CPM with HR 764.

Separation over time

Measured 1777 → 2019 (242 y)

Separation drift 41.0" → 37.9" (-3.10")

Rate -0.0128" / y

PA drift 275° → 275° (+0°, +0.000°/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.