When is the best time to observe 35 Comae Berenices?

35 Comae Berenices is best observed from February through April, with peak visibility during March when it transits around midnight in the Northern Hemisphere.

Where is 35 Comae Berenices located in the sky?

35 Comae Berenices lies in the constellation Coma Berenices at right ascension 12h 53m and declination +21° 15′.

What telescope do I need to split 35 Comae Berenices?

Splitting 35 Comae Berenices requires an aperture of roughly 150 mm or larger — the components are separated by about 1.2″ at magnitudes near 4.9. Larger apertures and steady seeing help resolve the pair cleanly.

35 Comae Berenices — Double Star in Coma Berenices

Observable Double Star Fair (27/100)

Sep: 1.2", Companion: mag 7.1

Magnitude 4.9^m DoubleStar Coma Berenices (Com) Visible

Star Map + List + Plan

Observe

1Physical Properties

Magnitude 4.90

Spectral Type G8III+F6V giant

Star Color Orange (B-V 0.90)

Distance 155 ly

2Position & Identifiers

RA 12h 53m 17.8s

Dec +21° 14' 42.0"

Constellation Coma Berenices (Com)

HR 4894

HIP 62886

HD 112033

SAO 82550

Flamsteed 35 Com

Double Cat 8695

SIMBAD

3How easy to split?

Primary 4.9 mag Companion 7.1 mag Separation 1.2″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	V. hard+	V. hard+	V. hard+
150 mm Newton 150mm Newt.	Hard+	Hard+	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 Feb – Apr (peak: Mar)

5Multiple Star System Quadruple

Components 4 (quadruple)

Component IDs AB

Separation 1.2″

Companion Mag 7.1

Position Angle 205°

Star Colors A: Orange

Discoverer STF1687

Notes

AB 5.05 G8III, 7.22 F3V, 510y, a = 1.42", or 674.23y, a = 1.897"; masses 2.7 and 1.4 solar. Component C, 9.74V, | +0.73(B-V), +0.31(U-B) G3IV-V 29", possibly physical, although a hyperbolic orbit has been computed with periastron | about 400 years ago.