When is the best time to observe HIP 77235?

HIP 77235 is best observed from April through June, with peak visibility during May when it transits around midnight in the Northern Hemisphere.

Where is HIP 77235 located in the sky?

HIP 77235 lies in the constellation Libra at right ascension 15h 46m and declination -28° 04′.

What telescope do I need to split HIP 77235?

Splitting HIP 77235 requires an aperture of roughly 340 mm or larger — the components are separated by about 0.7″ at magnitudes near 6.5. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 77235 — Double Star in Libra

Magnitude 6.5^m DoubleStar Libra (Lib) Visible

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Observe

1Physical Properties

Magnitude 6.51

Spectral Type F2IV subgiant

Star Color Yellow-white (B-V 0.32)

2Position & Identifiers

RA 15h 46m 12.8s

Dec -28° 03' 42.0"

Constellation Libra (Lib)

HR 5856

HIP 77235

HD 140722

SAO 183772

Double Cat 9775

SIMBAD

3How easy to split?

Primary 6.5 mag Companion 7.0 mag Separation 0.7″

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

Easy Medium Hard Very hard Impossible

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

To reach "Medium" at Bortle 3, you'd need at least a 340 mm reflector.

4Visibility

Set a location in User Settings to see visibility data.

Best season Apr – Jun (peak: May)

5Multiple Star System Triple

Components 3 (triple)

Component IDs AB

Separation 0.7″

Companion Mag 7.0

Position Angle 356°

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

Discoverer BU 620

Notes

AB binary; C, 9.0 G0 at 51" fixed.

Separation over time

Period: 700.0 y Eccentricity: 0.859 Now: 0.66", PA 355° + 0.01" in 5 years

Apparent separation over time, computed from ORB6 orbital elements. Steep curves indicate fast-changing pairs — catch them while they're splittable.

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

A: 6.5 · B: 7.0 · Sep: 0.7″ · PA: 356° · N up, E right

Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

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Size Comparison

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Spectral Classification

Hertzsprung-Russell Diagram

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Stellar Lifecycle

Blackbody Spectrum

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

Stellar Fusion

Nearby in the Sky

Other targets within a few degrees — pan your scope a little and keep exploring.

Visibility scores assume a 150 mm Newton at Bortle 4.

2 Sco

Medium

Tight double — a rewarding split at 2.0″

Double Star mag 4.59 3.2° Scorpius

12 Sco

Easy

Easy double, sep 3.8″

Double Star mag 5.67 5.7° Scorpius

Dschubba

HIP 78401; Delta Scorpii; 7 Scorpii

Easy

Bright naked-eye star, mag 2.3

Double Star mag 2.32 6.3° Scorpius

NGC 5903

Medium+

Elliptical galaxy

Galaxy mag 11.5 7.4° Libra

Spider Globular Cluster

Easy

Large bright globular cluster

Globular Cluster mag 5.6 8.4° Scorpius

IC 4604

rho Oph nebula

Medium+

Reflection nebula around a bright star

Reflection Nebula mag 5.10 10.0° Ophiuchus

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