42 Her
HIP 81497; 42 Her
DoubleStar
Her
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.90
Spectral Type
M2.5IIIab
Star Color
Red
(B-V 1.55)
Distance
191.9 ly
Position & Identifiers
RA
16h 38m 44.9s
Dec
+48° 55' 42.0"
Constellation
Her
HR
6200
HIP
81497
Flamsteed
42 Her
Double Cat
10144
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Separation
28.1″
Companion Mag
11.8
Position Angle
92°
Star Colors
A: Red
Discoverer
STF2082
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 28.1″ · PA: 92° · 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
Optical.
Survey Image
Loading survey image…