Menu

V640 Cas

Observable Double Star Fair (26/100)

Sep: 1.5", Companion: mag 7.3

HIP 518 DoubleStar Cassiopeia (Cas) Visible Level 4 Large telescope (10"+) - Requires steady seeing
Star Map
Add to List Add to Plan Back to Catalog

Physical Properties

Magnitude 5.96
Range 5.97 - 5.98
Period 48 days
Variable Type R
Spectral Type G5V
Star Color Yellow (B-V 0.67)
Distance 69 ly

Position & Identifiers

RA 00h 06m 16.0s
Dec +58° 26' 12.0"
Constellation Cassiopeia (Cas)
HR 5
HIP 518
Variable ID V640 Cas
Double Cat 61

Visibility

Set a location in User Settings to see visibility data.

Light Curve

Multiple Star System

Separation 1.5″
Companion Mag 7.3
Companion Sp G8V
Position Angle 8°
Star Colors A: Yellow B: Orange
Discoverer STF3062

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 8° A (6.0) B (7.3)

Sep: 1.5″ · PA: 8° · N up, E left

Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

Size Comparison

Querying VizieR for stellar data…

Compare Stars

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 Fusion

Stellar Notes

Amp. 0.066V, 1.0819d.
6.43 dG4, 7.19 dG8, 106.83y, a = 1.432". Component B has possible invisible companion, period 6.9y.
0.051".

Light Travel Time Machine

Relativistic Travel

Survey Image

Loading survey image…

}