When is the best time to observe HIP 7673?

HIP 7673 is best observed from September through November, with peak visibility during October when it transits around midnight in the Northern Hemisphere.

Where is HIP 7673 located in the sky?

HIP 7673 lies in the constellation Eridanus at right ascension 01h 39m and declination -53° 26′.

What telescope do I need to split HIP 7673?

Splitting HIP 7673 requires an aperture of roughly 60 mm or larger — the components are separated by about 10.2″ at magnitudes near 6.8. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 7673 — Double Star in Eridanus

Magnitude 6.8^m DoubleStar Eridanus (Eri) Visible

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Observe

1Physical Properties

Magnitude 6.84

Spectral Type F5IV-V subgiant

Star Color Yellow-white (B-V 0.44)

2Position & Identifiers

RA 01h 38m 48.2s

Dec -53° 26' 20.0"

Constellation Eridanus (Eri)

HR 479

HIP 7673

HD 10241

SAO 232483

SIMBAD

3How easy to split?

Primary 6.8 mag Companion 8.5 mag Separation 10.2″

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

5Multiple Star System

Separation 10.2″

Companion Mag 8.5

Companion Sp F8IV

Position Angle 105°

Star Colors A: Yellow-white B: Yellow

Discoverer DUN 4

Notes

CPM. Combined mag., colors. Primary F4IV-V, secondary F8V.

Separation over time

Measured 1826 → 2020 (194 y)

Separation drift 15.8" → 10.2" (-5.60")

Rate -0.0289" / y

PA drift 107° → 105° (-2°, -0.010°/y)

Apparent motion is significant on a human timescale — worth revisiting in a decade.

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.