HIP 41817 — Double Star in Pyxis

Magnitude 5.4^m DoubleStar Pyxis (Pyx) Visible

Star Map + List + Plan Star Hop

Observe

1Physical Properties

Magnitude 5.42

Spectral Type A0V

Star Color Blue-white (B-V -0.06)

Distance 1,087 ly

2Position & Identifiers

RA 08h 31m 30.9s

Dec -19° 34' 39.0"

Constellation Pyxis (Pyx)

HR 3367

HIP 41817

HD 72310

SAO 154359

Double Cat 6862

3How easy to split?

Primary 5.4 mag Companion 6.7 mag Separation 0.4″

Sign in and configure your equipment and default location to see a personalized row.

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

Easy Medium Hard Very hard Impossible

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

To reach "Medium" at Bortle 3, you'd need at least a 550 mm reflector.

4Visibility

Set a location in User Settings to see visibility data.

Best season Dec – Feb (peak: Jan)

5Multiple Star System

Separation 0.4″

Companion Mag 6.7

Position Angle 280°

Star Colors A: Blue-white B: White

Discoverer I 489

Separation over time

Period: 261.1 y Eccentricity: 0.241 Now: 0.40", PA 273° + 0.00" in 5 years

Apparent separation over time, computed from ORB6 orbital elements. Steep curves indicate fast-changing pairs — catch them while they're splittable.

Eyepiece View

Telescope Eyepiece

Log in to set your own equipment

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

A: 5.4 · B: 6.7 · Sep: 0.4″ · PA: 280° · N up, E right

Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

Explore

6

Size Comparison

Querying VizieR for stellar data…

7

Compare Stars

Compare with another star

8

Spectral Classification

9

Hertzsprung-Russell Diagram

Loading HR diagram…

Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map

10

Stellar Lifecycle

11

Blackbody Spectrum

12

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

13

Stellar Fusion

Discover

14Stellar Notes

Dynamical

0.010".

15

Light Travel Time Machine

16

Relativistic Travel

Nearby in the Sky

Other targets within a few degrees — pan your scope a little and keep exploring.

Visibility scores assume a 150 mm Newton at Bortle 4.

Galaxy mag 10.4 3.4° Pyxis

Open Cluster mag 9.0 7.3° Puppis

Explore Nightbase

Related knowledge, tools, and stories — no observation planning required.

Mythology, bright stars, and deep-sky highlights.

Double Stars — A Guide for Observers

Two suns where one appeared — how to find, split, and appreciate the night sky's finest pairs. From Albireo's gold-and-blue to the Sirius B challenge.

Polar caps, dust storms, and observing its oppositions.

}