When is the best time to observe Zeta Antliae?

Zeta Antliae is best observed from January through March, with peak visibility during February when it transits around midnight in the Northern Hemisphere.

Where is Zeta Antliae located in the sky?

Zeta Antliae lies in the constellation Antlia at right ascension 09h 31m and declination -31° 53′.

What telescope do I need to split Zeta Antliae?

Splitting Zeta Antliae requires an aperture of roughly 80 mm or larger — the components are separated by about 8.3″ at magnitudes near 6.2. Larger apertures and steady seeing help resolve the pair cleanly.

Zeta Antliae — Double Star in Antlia

HIP 46657; Zeta1 Antliae

Magnitude 6.2^m DoubleStar Antlia (Ant) Visible

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Observe

1Physical Properties

Magnitude 6.18

Spectral Type A0V

Star Color Blue-white (B-V 0.03)

Distance 3,262 ly

2Position & Identifiers

RA 09h 30m 46.1s

Dec -31° 53' 22.0"

Constellation Antlia (Ant)

HR 3781

HIP 46657

HD 82384

SAO 200445

Bayer Zeta1

SIMBAD Wikipedia

3How easy to split?

Primary 6.2 mag Companion 6.8 mag Separation 8.3″

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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 Jan – Mar (peak: Feb)

5Multiple Star System

Separation 8.3″

Companion Mag 6.8

Companion Sp A1V

Position Angle 212°

Star Colors A: Blue-white B: White

Discoverer DUN 78

Notes

CPM with HR 3780. Mag. and colors for combined light, 5.76V, +0.05(B-V), +0.05(U-B).

Separation over time

Measured 1836 → 2020 (184 y)

Separation drift 8.0" → 8.3" (+0.30")

Rate +0.0016" / y

PA drift 210° → 212° (+2°, +0.011°/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.