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Caldwell 45 — Galaxy in Boötes

NGC 5248

Galaxy Excellent (64/100)

Barred Spiral

Magnitude 10.2m Galaxy Boötes Visible
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About C45

Description

NGC 5248 is a grand-design spiral galaxy in Bootes, about 59 million light-years away. It has two prominent, well-defined spiral arms and a ring of active star formation around its nucleus.

Observing Tips

Visible as a moderately bright, round glow in a 6-inch telescope. Larger scopes may reveal hints of the bright inner ring structure. Best in spring and summer evenings.

History

Discovered by William Herschel on March 15, 1784. The galaxy's nuclear ring of star formation has been studied extensively as an example of circumnuclear starburst activity.

Fun Facts

NGC 5248 contains a spectacular circumnuclear ring of young star clusters about 1,000 light-years in diameter, visible in Hubble images as a glowing necklace of blue star-forming regions.

Observe

1Properties

Magnitude 10.2
Angular Size 4.1′ × 2.4′
Position Angle 120°
Distance 74.00 million ly
Galaxy Type Barred Spiral (SABb)
Spiral Galaxy [Distance: 74000000 ly]

Position & Identifiers

RA 13h 37m 31.9s
Dec +08° 53' 06.0"
Constellation Boötes
Catalog C45
Also known as NGC 5248

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Medium+ Medium Hard+
150mm Newt. Easy Medium+ Medium+
C8 203mm Easy Easy Medium+
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

Medium on Seestar S50

3Visibility

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Best season Mar – May (peak: Apr)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

C45 · 4.1′×2.4′ · N up, E left

5 Best Magnification

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6 Surface Brightness

7 Morphology Decoder

8 Inclination & True Shape

9 Redshift

10 Size Comparator

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11

Light Travel Time Machine

12

Relativistic Travel

Community Photos (1)

Credit: Credit Line and Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona. License: CC BY-SA 3.0 us. (Wikimedia Commons)

Credit: Credit Line and Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona. License: CC BY-SA 3.0 us. (Wikimedia Commons)

Skybred Mar 2, 2026

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