When is the best time to observe HIP 89674?

HIP 89674 is best observed from May through July, with peak visibility during June when it transits around midnight in the Northern Hemisphere.

Where is HIP 89674 located in the sky?

HIP 89674 lies in the constellation Pavo at right ascension 18h 18m and declination -68° 14′.

What telescope do I need to split HIP 89674?

Splitting HIP 89674 requires an aperture of roughly 100 mm or larger — the components are separated by about 2.4″ at magnitudes near 6.3. The companion is about 3.6 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 89674 — Double Star in Pavo

Magnitude 6.3^m DoubleStar Pavo (Pav) Visible

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Observe

1Physical Properties

Magnitude 6.33

Spectral Type B9V

Star Color Blue-white (B-V -0.04)

2Position & Identifiers

RA 18h 18m 00.9s

Dec -68° 13' 45.0"

Constellation Pavo (Pav)

HR 6808

HIP 89674

HD 166841

SAO 254196

SIMBAD

3How easy to split?

Primary 6.3 mag Companion 9.9 mag Separation 2.4″

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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 May – Jul (peak: Jun)

5Multiple Star System

Separation 2.4″

Companion Mag 9.9

Position Angle 300°

Star Colors A: Blue-white B: Yellow

Discoverer HDO 289

Separation over time

Measured 1897 → 2008 (111 y)

Separation drift 3.8" → 2.4" (-1.40")

Rate -0.0126" / y

PA drift 290° → 300° (+10°, +0.090°/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.