When is the best time to observe 35 Sextantis?

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

Where is 35 Sextantis located in the sky?

35 Sextantis lies in the constellation Sextans at right ascension 10h 43m and declination +04° 45′.

What telescope do I need to split 35 Sextantis?

Splitting 35 Sextantis requires an aperture of roughly 80 mm or larger — the components are separated by about 6.8″ at magnitudes near 5.8. Larger apertures and steady seeing help resolve the pair cleanly.

35 Sextantis — Double Star in Sextans

Observable Double Star Excellent (70/100)

Sep: 6.8", Companion: mag 7.1

Magnitude 5.8^m DoubleStar Sextans (Sex) Visible

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Observe

1Physical Properties

Magnitude 5.79

Spectral Type K3III+K0III giant

Star Color Red (B-V 1.17)

Distance 1,087 ly

2Position & Identifiers

RA 10h 43m 20.9s

Dec +04° 44' 52.0"

Constellation Sextans (Sex)

HR 4193

HIP 52452

HD 92841

SAO 118449

Flamsteed 35 Sex

Double Cat 7902

SIMBAD

3How easy to split?

Primary 5.8 mag Companion 7.1 mag Separation 6.8″

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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 Triple C: optical

Components 3 (triple)

Component IDs AB

Separation 6.8″

Companion Mag 7.1

Companion Sp K0III

Position Angle 239°

Star Colors A: Red B: Orange

Discoverer STF1466

Notes

AB binary. B is K0III.

Separation over time

Measured 1821 → 2019 (198 y)

Separation drift 7.9" → 6.8" (-1.10")

Rate -0.0056" / y

PA drift 238° → 239° (+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.