Targets / Messier M40

Astrophotoguru™ · Winnecke 4

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Messier M40

Winnecke 4

Double Star
Ursa Major
Beginner

Optical double star cataloged by Messier.

Angular size
0.8′
Magnitude
8.4
Best months
Feb-Jun
Constellation
Ursa Major
Catalog IDs
M40
Common aliases
Winnecke 4;WNC 4
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Recommended telescopes

Celestron
Celestron EdgeHD 14
3910mm f/11.0 · 356mm aperture
Frames 5% of APS-C FOV
Celestron
Celestron EdgeHD 11
2800mm f/10.0 · 279mm aperture
Frames 3% of APS-C FOV
Meade
Meade LX200 10" ACF
2540mm f/10.0 · 254mm aperture
Frames 3% of APS-C FOV
Astro-Tech
Astro-Tech AT12RC
2432mm f/8.0 · 305mm aperture
Frames 3% of APS-C FOV
Takahashi
Takahashi Mewlon-210
2415mm f/11.5 · 210mm aperture
Frames 3% of APS-C FOV
Celestron
Celestron EdgeHD 9.25
2350mm f/10.0 · 235mm aperture
Frames 3% of APS-C FOV

Recommended cameras

ZWO
ZWO ASI2600MC Pro
3.76µm pixels · cooled
ZWO
ZWO ASI2600MM Pro
3.76µm pixels · cooled
ZWO
ZWO ASI6200MC Pro
3.76µm pixels · cooled
ZWO
ZWO ASI6200MM Pro
3.76µm pixels · cooled
ZWO
ZWO ASI533MC Pro
3.76µm pixels · cooled
ZWO
ZWO ASI533MM Pro
3.76µm pixels · cooled

Example framing

Celestron EdgeHD 14 + ZWO ASI2600MC Pro
FOV 0.34° × 0.23°
Scale 0.20″/px
Target fills 7% of frame
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Celestron EdgeHD 11 + ZWO ASI2600MC Pro
FOV 0.48° × 0.32°
Scale 0.28″/px
Target fills 5% of frame
Preview in planner
Meade LX200 10" ACF + ZWO ASI533MC Pro
FOV 0.26° × 0.26°
Scale 0.31″/px
Target fills 7% of frame
Preview in planner
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