Mesarthim
Gamma Ari (BS546)
Observable Double Star
Excellent (74/100)
Sep: 7.3", Companion: mag 4.6
HIP 8832; Gamma2 Ari; 5 Ari
DoubleStar
Ari
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.75
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
A1pSi
Star Color
Blue-white
(B-V -0.04)
Distance
125.4 ly
Position & Identifiers
RA
01h 53m 31.8s
Dec
+19° 17' 37.0"
Constellation
Ari
HR
546
HIP
8832
Bayer
Gamma2
Flamsteed
5 Ari
Variable ID
Gam Ari
Double Cat
1507
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Components
3
Component IDs
AB
Separation
7.3″
Companion Mag
4.6
Companion Sp
B9V
Position Angle
0°
Star Colors
A: Blue-white
B: Blue-white
Discoverer
STF 180
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 7.3″ · PA: 0° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
Querying VizieR for stellar data…
Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
Loading HR diagram…
Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
Alpha CV 3.88 - 3.90V, 2.6095 or 1.7982d; also possibly 2.5 hrs., amp. 0.02, unconfirmed. Southern component of | ADS 1507. Magnetic var.
Binary with HR 545, orbital period 5000 - 10000y? Component C, 9.6v at 221". Combined colors for HR 545-6; combined | mag. 3.88V.
Pleiades group.
Also classified A0pCr, A1pCrSiSr.
0.019".
Mesarthim; Mesartim; "First Star in Aries".
Survey Image
Loading survey image…