When is the best time to observe HIP 83187?

HIP 83187 is best observed from May through July, with peak visibility during June when it transits around midnight in the Northern Hemisphere.

Where is HIP 83187 located in the sky?

HIP 83187 lies in the constellation Ara at right ascension 17h 00m and declination -54° 36′.

What telescope do I need to split HIP 83187?

Splitting HIP 83187 requires an aperture of roughly 60 mm or larger — the components are separated by about 25.2″ at magnitudes near 5.7. The companion is about 6.3 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 83187 — Double Star in Ara

Magnitude 5.7^m DoubleStar Ara Visible

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Observe

1Physical Properties

Magnitude 5.65

Spectral Type A5IV-V subgiant

Star Color Yellow-white (B-V 0.19)

2Position & Identifiers

RA 17h 00m 06.2s

Dec -54° 35' 49.0"

Constellation Ara

HR 6297

HIP 83187

HD 153053

SAO 244338

SIMBAD

3How easy to split?

Primary 5.7 mag Companion 12.0 mag Separation 25.2″

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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.	Medium	Hard+	Hard
Celestron C8 (203 mm SCT) C8 203mm	Medium+	Medium	Hard+

Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

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Best season May – Jul (peak: Jun)

5Multiple Star System

Separation 25.2″

Companion Mag 12.0

Position Angle 51°

Star Colors A: Yellow-white

Discoverer HDO 262

Separation over time

Measured 1891 → 2010 (119 y)

Separation drift 25.0" → 25.2" (+0.20")

Rate +0.0017" / y

PA drift 75° → 51° (-24°, -0.202°/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.