When is the best time to observe HIP 19805?

HIP 19805 is best observed from October through December, with peak visibility during November when it transits around midnight in the Northern Hemisphere.

Where is HIP 19805 located in the sky?

HIP 19805 lies in the constellation Reticulum at right ascension 04h 15m and declination -62° 12′.

What telescope do I need to split HIP 19805?

Splitting HIP 19805 requires an aperture of roughly 60 mm or larger — the components are separated by about 13.8″ at magnitudes near 5.5. The companion is about 5.5 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

HIP 19805 — Double Star in Reticulum

Magnitude 5.5^m DoubleStar Reticulum (Ret) Visible

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Observe

1Physical Properties

Magnitude 5.45

Spectral Type K0III giant

Star Color Orange (B-V 1.10)

Distance 544 ly

2Position & Identifiers

RA 04h 14m 48.7s

Dec -62° 11' 31.0"

Constellation Reticulum (Ret)

HR 1340

HIP 19805

HD 27304

SAO 248973

SIMBAD

3How easy to split?

Primary 5.5 mag Companion 11.0 mag Separation 13.8″

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

Easy Medium Hard Very hard Impossible

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

4Visibility

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Best season Oct – Dec (peak: Nov)

5Multiple Star System

Separation 13.8″

Companion Mag 11.0

Position Angle 212°

Star Colors A: Orange

Discoverer HJ 3641

Notes

Optical.

Separation over time

Measured 1835 → 2015 (180 y)

Separation drift 8.0" → 13.8" (+5.80")

Rate +0.0322" / y

PA drift 286° → 212° (-74°, -0.411°/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.