Zeta Horologii — Star in Horologium
Observe
1Physical Properties
Magnitude
5.21
Spectral Type
F4IV
subgiant
Star Color
Yellow-white
(B-V 0.40)
Distance
105 ly
2Position & Identifiers
RA
02h 40m 39.6s
Dec
-54° 32' 60.0"
Constellation
Horologium
(Hor)
HR
802
HIP
12484
HD
16920
SAO
232857
Bayer
Zeta
Querying VizieR catalog...
3How easy to spot?
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| 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
Sep – Nov
(peak: Oct)
5Survey Image
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Explore
6
Size Comparison
Querying VizieR for stellar data…
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
14Stellar Notes
F3, F5, 12.9274d, K 58.1k/s, V0 +5.8k/s, msin3i 1.24, asini 10.0.
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.
NGC 1249
Barred spiral galaxy
Galaxy
mag 12.0
4.5°
Horologium
C87
NGC 1261
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.4
4.6°
Horologium
TW Hor
Semi-regular variable, range 5.5–6.0
Variable Star
mag 5.74
5.3°
Horologium
Achernar
HIP 7588; Alpha Eridani
Bright naked-eye star, mag 0.5
Double Star
mag 0.46
9.2°
Eridanus
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The Hertzsprung-Russell Diagram — Reading Stars Like a Map
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