9 Lacertae — Double Star in Lacerta
Observe
1Physical Properties
Magnitude
4.63
Spectral Type
A8IV
subgiant
Star Color
Yellow-white
(B-V 0.24)
Distance
148 ly
2Position & Identifiers
RA
22h 37m 22.4s
Dec
+51° 32' 43.0"
Constellation
Lacerta
(Lac)
HR
8613
HIP
111674
HD
214454
SAO
34628
Flamsteed
9 Lac
Querying VizieR catalog...
3How easy to split?
Primary
4.6 mag
Companion
9.8 mag
Separation
14.8″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Medium+ | Medium | Medium |
| 150 mm Newton 150mm Newt. | Easy | Easy | Medium+ |
| Celestron C8 (203 mm SCT) C8 203mm | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Jul – Sep
(peak: Aug)
5Multiple Star System
Separation
14.8″
Companion Mag
9.8
Position Angle
215°
Star Colors
A: Yellow-white
Discoverer
DRS 69
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 4.6 · B: 9.8 · Sep: 14.8″ · PA: 215° · N up, E right
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
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6
Size Comparison
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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.
NGC 7296
Open cluster
Open Cluster
mag 10.0
1.6°
Lacerta
V509 Cas
Variable star, range 4.8–5.5
Variable Star
mag 5.00
6.3°
Cassiopeia
Cocoon Nebula
IC 5146
Emission nebula — try an OIII filter
Emission Nebula
mag 10.0
8.3°
Cygnus
2 Cas
Easy double, sep 167.2″
Double Star
mag 5.70
9.0°
Cassiopeia
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