When is the best time to observe 2 Comae Berenices?

2 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 2 Comae Berenices located in the sky?

2 Comae Berenices lies in the constellation Coma Berenices at right ascension 12h 04m and declination +21° 28′.

What telescope do I need to split 2 Comae Berenices?

Splitting 2 Comae Berenices requires an aperture of roughly 100 mm or larger — the components are separated by about 3.7″ at magnitudes near 5.9. Larger apertures and steady seeing help resolve the pair cleanly.

2 Comae Berenices — Double Star in Coma Berenices

Observable Double Star Good (51/100)

Sep: 3.7", Companion: mag 7.5

Magnitude 5.9^m DoubleStar Coma Berenices (Com) Visible

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Observe

1Physical Properties

Magnitude 5.87

Spectral Type F0IV-V subgiant

Star Color Yellow-white (B-V 0.22)

Distance 652 ly

2Position & Identifiers

RA 12h 04m 16.6s

Dec +21° 27' 33.0"

Constellation Coma Berenices (Com)

HR 4602

HIP 58858

HD 104827

SAO 82123

Flamsteed 2 Com

Double Cat 8406

SIMBAD

3How easy to split?

Primary 5.9 mag Companion 7.5 mag Separation 3.7″

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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

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Best season Feb – Apr (peak: Mar)

5Multiple Star System

Separation 3.7″

Companion Mag 7.5

Position Angle 234°

Star Colors A: Yellow-white B: Yellow

Discoverer STF1596

Notes

Binary. Companion A9V. vsini both components =<50k/s.

Separation over time

Measured 1782 → 2023 (241 y)

Separation drift 4.0" → 3.7" (-0.30")

Rate -0.0012" / y

PA drift 242° → 234° (-8°, -0.033°/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.