When is the best time to observe HIP 89370?

HIP 89370 is best observed from May through July, with peak visibility during June when it transits around midnight in the Northern Hemisphere.

Where is HIP 89370 located in the sky?

HIP 89370 lies in the constellation Pavo at right ascension 18h 14m and declination -63° 41′.

What telescope do I need to split HIP 89370?

Splitting HIP 89370 requires an aperture of roughly 60 mm or larger — the components are separated by about 19.3″ at magnitudes near 6.5. The companion is about 5.1 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 89370 — Double Star in Pavo

Magnitude 6.5^m DoubleStar Pavo (Pav) Visible

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Observe

1Physical Properties

Magnitude 6.47

Spectral Type K4III giant

Star Color Red (B-V 1.41)

2Position & Identifiers

RA 18h 14m 16.2s

Dec -63° 41' 22.0"

Constellation Pavo (Pav)

HR 6796

HIP 89370

HD 166251

SAO 254179

SIMBAD

3How easy to split?

Primary 6.5 mag Companion 11.6 mag Separation 19.3″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard	V. hard+	V. hard
150 mm Newton 150mm Newt.	Medium	Medium	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 May – Jul (peak: Jun)

5Multiple Star System

Separation 19.3″

Companion Mag 11.6

Position Angle 193°

Star Colors A: Red

Discoverer HDO9002

Notes

Companion not confirmed.

Separation over time

Measured 1897 → 2015 (118 y)

Separation drift 19.0" → 19.3" (+0.30")

Rate +0.0025" / y

PA drift 182° → 193° (+11°, +0.093°/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.