Lambda Aquarii — Double Star in Aquarius
Observe
1Physical Properties
Magnitude
3.74
Range
3.57 - 3.80
Period
24.5 days
Variable Type
Semi-Regular Variable (Short Period)
Spectral Type
M1/2 III
Star Color
Red
(B-V 1.64)
Distance
382 ly
2Position & Identifiers
RA
22h 52m 36.9s
Dec
-07° 34' 47.0"
Constellation
Aquarius
(Aqr)
HR
8698
HIP
112961
HD
216386
SAO
146362
Bayer
Lambda
Flamsteed
73 Aqr
Variable ID
Lam Aqr
Querying VizieR catalog...
3How easy to split?
Primary
3.7 mag
Companion
8.3 mag
Separation
0.6″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | V. hard | V. hard | V. hard |
| 150 mm Newton 150mm Newt. | V. hard | V. hard | V. hard |
| Celestron C8 (203 mm SCT) C8 203mm | V. hard | V. hard | V. hard |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
To reach "Medium" at Bortle 3, you'd need at least a 1040 mm reflector.
4Visibility
Set a location in User Settings to see visibility data.
Best season
Jul – Sep
(peak: Aug)
5Light Curve
6Multiple Star System
Separation
0.6″
Companion Mag
8.3
Companion Sp
F5V
Position Angle
247°
Star Colors
A: Red
B: Yellow-white
Discoverer
SAO 1
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 3.7 · B: 8.3 · Sep: 0.6″ · PA: 247° · N up, E right
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
Explore
8
Size Comparison
Querying VizieR for stellar data…
9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
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12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
Discover
16Stellar Notes
Lb 3.70 - 3.80V.
Ultraviolet FeII emission.
Occultation diam. = 0.0074".
17
Light Travel Time Machine
18
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 7416
Edge-on galaxy
Galaxy
mag 12.3
2.2°
Aquarius
Chi Aqr
Semi-regular variable, range 4.9–5.2
Variable Star
mag 5.06
6.0°
Aquarius
Sigma Aqr
Colorful double, sep 3.7″
Double Star
mag 4.82
6.2°
Aquarius
94 Aqr
Easy double, sep 12.3″
Double Star
mag 5.08
8.8°
Aquarius
NGC 7492
Compact globular cluster
Globular Cluster
mag 11.5
8.9°
Aquarius
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