Observe
1Physical Properties
Magnitude
4.33
Spectral Type
Am
Star Color
Yellow-white
(B-V 0.27)
Distance
155 ly
2Position & Identifiers
RA
12h 03m 01.5s
Dec
-63° 18' 46.0"
Constellation
Crux
(Cru)
HR
4599
HIP
58758
HD
104671
SAO
251705
Bayer
Theta1
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium+ | Medium |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Feb – Apr
(peak: Mar)
5Survey Image
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Explore
7
Size Comparison
Querying VizieR for stellar data…
8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
Loading HR diagram…
11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
Discover
15Stellar Notes
24.4828d, K 46.1k/s, V0 -2.8k/s, msin3i 0.741, asini 12.3.
Hyades moving group.
16
Light Travel Time Machine
17
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.
NGC 4052
Open cluster
Open Cluster
mag 9.0
0.1°
Crux
Alpha Cru
HIP 60718; Alpha2 Crucis
Hot blue O-type star
Star
mag 1.73
2.7°
Crux
Lambda Centauri Nebula
IC 2944
Emission nebula — try an OIII filter
Emission Nebula
mag 4.5
3.1°
Centaurus
Epsilon Mus
Semi-regular variable, range 4.0–4.3
Variable Star
mag 4.11
4.9°
Musca
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Article
Crux
Mythology, bright stars, and deep-sky highlights.
Constellation
