Eta Sagittae — Star in Sagitta
Observe
1Physical Properties
Magnitude
5.10
Spectral Type
K2III
giant
Star Color
Orange
(B-V 1.06)
Distance
102 ly
2Position & Identifiers
RA
20h 05m 09.5s
Dec
+19° 59' 28.0"
Constellation
Sagitta
(Sge)
HR
7679
HIP
98920
HD
190608
SAO
105659
Bayer
Eta
Flamsteed
16 Sge
Querying VizieR catalog...
3How easy to spot?
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 | Medium | Hard+ | Hard+ |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | 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
Jun – Aug
(peak: Jul)
5Survey Image
Loading survey image…
Explore
6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
Loading HR diagram…
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
14Stellar Notes
Hyades group.
15
Light Travel Time Machine
16
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.
Gamma Sge
Cool red giant
Star
mag 3.47
1.6°
Sagitta
M71
Angelfish Cluster
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.2
2.9°
Sagitta
M27
NGC 6853
Planetary nebula — try an OIII filter
Planetary Nebula
mag 8.1
3.0°
Vulpecula
10 Sge
Pulsating variable, period 8.4d
Variable Star
mag 5.36
4.0°
Sagitta
NGC 6830
Open cluster
Open Cluster
mag 7.9
4.5°
Vulpecula
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
Sagitta
Mythology, bright stars, and deep-sky highlights.
Constellation
The Hertzsprung-Russell Diagram — Reading Stars Like a Map
The HR diagram turns the night sky into a physics map: every named star has a spot, every spot tells you mass, age, and fate. A guide for amateur observers.
Article
