HIP 56245 — Double Star in Crater
Observe
1Physical Properties
Magnitude
6.24
Spectral Type
F7IV
subgiant
Star Color
Yellow
(B-V 0.54)
2Position & Identifiers
RA
11h 31m 47.6s
Dec
-20° 46' 36.0"
Constellation
Crater
(Crt)
HR
4440
HIP
56245
HD
100219
SAO
179964
Querying VizieR catalog...
3How easy to split?
Primary
6.2 mag
Companion
11.0 mag
Separation
1.2″
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 570 mm reflector.
4Visibility
Set a location in User Settings to see visibility data.
Best season
Feb – Apr
(peak: Mar)
5Multiple Star System
Separation
1.2″
Companion Mag
11.0
Position Angle
252°
Star Colors
A: Yellow
B: Red
Discoverer
TOK 222
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 6.2 · B: 11.0 · Sep: 1.2″ · PA: 252° · 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
8
Spectral Classification
9
Hertzsprung-Russell Diagram
Loading HR diagram…
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
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.
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
Crater
Mythology, bright stars, and deep-sky highlights.
Constellation
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.
Article
Saturn
Rings, divisions, and the jewel of the outer Solar System.
Deep dive
