When is the best time to observe HIP 115510?

HIP 115510 is best observed from August through October, with peak visibility during September when it transits around midnight in the Northern Hemisphere.

Where is HIP 115510 located in the sky?

HIP 115510 lies in the constellation Grus at right ascension 23h 24m and declination -53° 48′.

What telescope do I need to split HIP 115510?

Splitting HIP 115510 requires an aperture of roughly 60 mm or larger — the components are separated by about 26.4″ at magnitudes near 6.2. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 115510 — Double Star in Grus

Magnitude 6.2^m DoubleStar Grus (Gru) Visible

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Observe

1Physical Properties

Magnitude 6.15

Spectral Type A4III giant

Star Color Yellow-white (B-V 0.26)

2Position & Identifiers

RA 23h 23m 54.3s

Dec -53° 48' 30.0"

Constellation Grus (Gru)

HR 8895

HIP 115510

HD 220392

SAO 247854

SIMBAD

3How easy to split?

Primary 6.2 mag Companion 7.1 mag Separation 26.4″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Easy	Easy	Easy
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 Aug – Oct (peak: Sep)

5Multiple Star System

Separation 26.4″

Companion Mag 7.1

Position Angle 211°

Star Colors A: Yellow-white B: Yellow-white

Discoverer DUN 249

Notes

CPM. Companion A3III, vsini 129k/s.

Separation over time

Measured 1826 → 2016 (190 y)

Separation drift 27.1" → 26.4" (-0.70")

Rate -0.0037" / y

PA drift 212° → 211° (-1°, -0.005°/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.