Delta Horologii — Double Star in Horologium
Observe
1Physical Properties
Magnitude
4.93
Spectral Type
A9V
Star Color
Yellow-white
(B-V 0.33)
Distance
272 ly
2Position & Identifiers
RA
04h 10m 50.6s
Dec
-41° 59' 37.0"
Constellation
Horologium
(Hor)
HR
1302
HIP
19515
HD
26612
SAO
216682
Bayer
Delta
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium | Medium | 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
Oct – Dec
(peak: Nov)
5Multiple Star System
Separation
0.1″
Companion Mag
7.3
Position Angle
171°
Star Colors
A: Yellow-white
B: Yellow
Discoverer
HDS 530
Separation over time
Period: 23.8 y
Eccentricity: 0.582
Now: 0.12", PA 127°
+ 0.04" in 5 years
Apparent separation over time, computed from ORB6 orbital elements. Steep curves indicate fast-changing pairs — catch them while they're splittable.
Explore
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
14Stellar Notes
Also classified F2IV/V.
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.
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