Delta Scuti — Star in Scutum
Observe
1Physical Properties
Magnitude
4.72
Range
4.60 - 4.79
Period
4.7 hours
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F2IIIpDel Del
bright giant
Star Color
Yellow-white
(B-V 0.35)
Distance
130 ly
2Position & Identifiers
RA
18h 42m 16.4s
Dec
-09° 03' 09.0"
Constellation
Scutum
(Sct)
HR
7020
HIP
91726
HD
172748
SAO
142515
Bayer
Delta
Variable ID
Del Sct
Double Cat
11581
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
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Best season
May – Jul
(peak: Jun)
5Survey Image
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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
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14Stellar Notes
ADS 11581A, Delta Sct 4.98 - 5.16B, 0.193770d, 0.11636d. Beat period 5.24774d. Other periods 0.095129, 0.186872, | 0.838d. This "prototype" Delta Sct star is the least typical of its class.
Component B, 10v, gK, optical. AC, CPM? A may be close binary, about 10d orbital period.
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.
M26
NGC 6694
Open cluster
Open Cluster
mag 8.0
0.8°
Scutum
S Sct
Semi-regular variable, range 6.6–7.3
Variable Star
mag 6.80
2.3°
Scutum
NGC 6712
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.2
2.7°
Scutum
IC 1287
Reflection nebula around a bright star
Reflection Nebula
mag 6.10
3.2°
Scutum
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