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38 Arietis — Star in Aries

Magnitude 5.2m Star Aries (Ari) Visible
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1Physical Properties

Magnitude 5.18
Range 5.18 - 5.22
Period 0.9 hours
Variable Type Delta Scuti (Low Amplitude)
Spectral Type A7III-IV giant
Star Color Yellow-white (B-V 0.24)
Distance 121 ly

2Position & Identifiers

RA 02h 44m 57.6s
Dec +12° 26' 45.0"
Constellation Aries (Ari)
HR 812
HIP 12832
HD 17093
SAO 93083
Flamsteed 38 Ari
Variable ID UV Ari
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium Hard+ Hard
50mm finder Easy Easy Easy
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 Sep – Nov (peak: Oct)

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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Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map
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

Delta Sct 5.18 - 5.22V, 0.0355d with overtones of 0.046 and 0.061d.
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.

Rho Ari
HIP 13654; Rho2 Arietis; 45 Arietis
Hard+
Semi-regular variable, range 5.6–6.0
Variable Star mag 5.91 6.4° Aries
NGC 821
Easy
Elliptical galaxy
Galaxy mag 10.8 9.1° Aries
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