Zeta Arietis — Double Star in Aries
Observe
1Physical Properties
Magnitude
4.89
Spectral Type
A1V
Star Color
White
(B-V -0.01)
Distance
163 ly
2Position & Identifiers
RA
03h 14m 54.1s
Dec
+21° 02' 40.0"
Constellation
Aries
(Ari)
HR
972
HIP
15110
HD
20150
SAO
75810
Bayer
Zeta
Flamsteed
58 Ari
Querying VizieR catalog...
3How easy to split?
Primary
4.9 mag
Companion
10.2 mag
Separation
2.0″
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| 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 430 mm reflector.
4Visibility
Set a location in User Settings to see visibility data.
Best season
Oct – Dec
(peak: Nov)
5Multiple Star System
Separation
2.0″
Companion Mag
10.2
Position Angle
136°
Star Colors
A: White
Discoverer
OCC 837
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 4.9 · B: 10.2 · Sep: 2.0″ · PA: 136° · N up, E right
At limit · 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
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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
14
Light Travel Time Machine
15
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.
Epsilon Ari
HIP 13914; Epsilon Arietis; 48 Arietis
Tight double — a rewarding split at 1.3″
Double Star
mag 4.63
3.7°
Aries
Rho Ari
HIP 13654; Rho2 Arietis; 45 Arietis
Semi-regular variable, range 5.6–6.0
Variable Star
mag 5.91
5.2°
Aries
NGC 1156
Galaxy
Galaxy
mag 11.7
5.5°
Aries
Pi Ari
Easy double, sep 3.3″
Double Star
mag 5.22
7.0°
Aries
M45
Pleiades, Seven Sisters or Subaru
Open cluster
Open Cluster
mag 1.6
8.1°
Taurus
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