Observe
1Physical Properties
Magnitude
5.64
Range
5.52 - 6.03
Period
9.9 days
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
A3Vm
Star Color
Yellow-white
(B-V 0.24)
Distance
142 ly
2Position & Identifiers
RA
06h 26m 25.8s
Dec
+56° 17' 06.0"
Constellation
Lynx
(Lyn)
HR
2291
HIP
30651
HD
44691
Variable ID
RR Lyn
Querying VizieR catalog...
3How easy to follow?
Magnitude
5.6 – 6.0 mag
Amplitude
0.4 mag
Period
9.95 d
Type
EA/DM
Sign in
and configure your equipment and default location to see a personalized row.
| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard+ | V. hard | V. hard |
| 50 mm finder 50mm finder | Hard+ | Hard+ | Hard+ |
| 150 mm telescope 150mm scope | Hard+ | Hard+ | Hard+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Out of reach for typical amateur telescopes, even at Bortle 3.
4Visibility
Set a location in User Settings to see visibility data.
Best season
Nov – Jan
(peak: Dec)
5Light Curve
6Comparison Stars for RR Lyn (5.6–6.0)
Nearby stable stars for estimating brightness (AAVSO)
Loading comparison stars…
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
EA 5.64 - 6.03V, 9.945070d, i 87.8d. Close third body or circumstellar matter needed to account for the light curve, | but no spectroscopic evidence available.
Possibly faint visual companion at 50".
9.9451d, K 65.7k/s, V0 -11.9k/s, msin3i 2.11, asini 8.98.
UMa stream; Sirius group.
CaII/H/met indicate A3/A1/F0-2, respectively. Spectrum also classified A3/A7/F2, A3Vm+F0V and A7V+F3V.
16
Light Travel Time Machine
17
Relativistic Travel
Survey Image
Loading survey image…
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.
2 Lyn
Pulsating variable, period 7.2h
Variable Star
mag 4.48
2.9°
Lynx
NGC 2128
Elliptical galaxy
Galaxy
mag 13.0
3.3°
Camelopardalis
Psi Aur
HIP 30520; Psi1 Aurigae; 46 Aurigae
Semi-regular variable, range 4.8–5.7
Variable Star
mag 4.91
7.0°
Auriga
NGC 2126
Open cluster
Open Cluster
mag 10.0
7.3°
Auriga
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
Arthur Eddington
1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
Biography
Variable Stars — A Guide for Observers
A practical guide to visual observation of variable stars: estimating magnitudes, finding comparison stars, recording data, and contributing to science with AAVSO.
Article
Lynx
Mythology, bright stars, and deep-sky highlights.
Constellation
