When is the best time to observe 54 Hydrae?

54 Hydrae is best observed from March through May, with peak visibility during April when it transits around midnight in the Northern Hemisphere.

Where is 54 Hydrae located in the sky?

54 Hydrae lies in the constellation Hydra at right ascension 14h 46m and declination -25° 27′.

What telescope do I need to split 54 Hydrae?

Splitting 54 Hydrae requires an aperture of roughly 80 mm or larger — the components are separated by about 8.1″ at magnitudes near 4.9. Larger apertures and steady seeing help resolve the pair cleanly.

54 Hydrae — Double Star in Hydra

Observable Double Star Good (56/100)

Sep: 8.1", Companion: mag 7.2

Magnitude 4.9^m DoubleStar Hydra (Hya) Visible

Star Map + List + Plan

Observe

1Physical Properties

Magnitude 4.94

Spectral Type F2III-IV giant

Star Color Yellow-white (B-V 0.35)

Distance 67 ly

2Position & Identifiers

RA 14h 46m 00.1s

Dec -25° 26' 35.0"

Constellation Hydra (Hya)

HR 5497

HIP 72197

HD 129926

SAO 182855

Flamsteed 54 Hya

Double Cat 9375

SIMBAD

3How easy to split?

Primary 4.9 mag Companion 7.3 mag Separation 8.1″

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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 Mar – May (peak: Apr)

5Multiple Star System C: optical

Separation 8.1″

Companion Mag 7.2

Companion Sp G1

Position Angle 122°

Star Colors A: Yellow-white B: Yellow

Discoverer H 3 97

Notes

Binary, components F0V, G1V.

Separation over time

Measured 1783 → 2015 (232 y)

Separation drift 11.3" → 8.1" (-3.20")

Rate -0.0138" / y

PA drift 128° → 122° (-6°, -0.026°/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.