When is the best time to observe HIP 59923?

HIP 59923 is best observed from February through April, with peak visibility during March when it transits around midnight in the Northern Hemisphere.

Where is HIP 59923 located in the sky?

HIP 59923 lies in the constellation Coma Berenices at right ascension 12h 18m and declination +28° 56′.

What telescope do I need to split HIP 59923?

Splitting HIP 59923 requires an aperture of roughly 80 mm or larger — the components are separated by about 8.4″ at magnitudes near 5.7. The companion is about 5.5 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 59923 — Double Star in Coma Berenices

Magnitude 5.7^m DoubleStar Coma Berenices (Com) Visible

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Observe

1Physical Properties

Magnitude 5.70

Spectral Type A4m:

Star Color White (B-V 0.16)

2Position & Identifiers

RA 12h 17m 30.5s

Dec +28° 56' 14.0"

Constellation Coma Berenices (Com)

HR 4673

HIP 59923

HD 106887

SAO 82219

Double Cat 8501

SIMBAD

3How easy to split?

Primary 5.7 mag Companion 11.2 mag Separation 8.4″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard	Hard	V. hard+
150 mm Newton 150mm Newt.	Medium+	Medium	Hard+
Celestron C8 (203 mm SCT) C8 203mm	Easy	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

Separation 8.4″

Companion Mag 11.2

Position Angle 282°

Star Colors A: White

Discoverer STT 245

Notes

CPM.

Separation over time

Measured 1843 → 2016 (173 y)

Separation drift 7.4" → 8.4" (+1.00")

Rate +0.0058" / y

PA drift 278° → 282° (+4°, +0.023°/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.