When is the best time to observe LN Andromedae?

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

Where is LN Andromedae located in the sky?

LN Andromedae lies in the constellation Andromeda at right ascension 23h 03m and declination +44° 04′.

What telescope do I need to split LN Andromedae?

Splitting LN Andromedae requires an aperture of roughly 80 mm or larger — the components are separated by about 7.6″ at magnitudes near 6.4. The companion is about 3.8 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

LN Andromedae — Double Star in Andromeda

DoubleStar Andromeda (And) Visible

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Observe

1Physical Properties

Magnitude 6.39

Range 6.37 - 6.40

Period 3.3 days

Variable Type SPB:

Spectral Type B2V

Star Color White (B-V 0.00)

2Position & Identifiers

RA 23h 02m 45.2s

Dec +44° 03' 32.0"

Constellation Andromeda (And)

HR 8768

HIP 113802

HD 217811

Variable ID LN And

Double Cat 16472

SIMBAD

3How easy to split?

Primary 6.4 mag Companion 10.1 mag Separation 7.6″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Medium+	Medium	Hard+
150 mm Newton 150mm Newt.	Easy	Easy	Medium+
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)

5Light Curve

6Multiple Star System

Separation 7.6″

Companion Mag 10.1

Position Angle 40°

Star Colors A: White B: Yellow

Discoverer STF2973

Notes

Fixed. Companion 9.88V, +0.08(B-V), -0.37(U-B), A1V.

Separation over time

Measured 1831 → 2020 (189 y)

Separation drift 7.4" → 7.6" (+0.20")

Rate +0.0011" / y

PA drift 41° → 40° (-1°, -0.005°/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.