RA 7h 29m · Dec +20° 55′

5′

A complex double-shell planetary nebula. The bright inner shell is surrounded by a larger, coarser outer shell of filaments resembling a fur-lined parka hood. The two-zone structure reflects two distinct mass-loss episodes.

Planetary nebula

Eskimo Nebula

C 39 · Gemini

These photons are ~6,500 years old

UV/IRUV/IR-cut. Blocks ultraviolet and infrared so refractor optics stay in focus across the visible band.

ZWO Seestar S50ZWO Seestar S50Aperture 50mm · Focal length 250mm · f/5 · Apo triplet with ED element · Sony IMX462 colour CMOS sensor (1920 x 1080, 2.1MP)…View equipment →

⧉ 5 versions of this capture — pick one to see its image and log

↻ Revisited — built over 2 nights, three nights later

1 18/03/2026 84m (507 x 10s) ZWO Seestar S50, ZWO Seestar S50 Camera
2 21/03/2026 24m (144 × 10s) ZWO Seestar S50, ZWO Seestar S50 Camera

18/03/2026 21/03/2026 Three nights later

Date: 21/03/2026
Location: 52.7618° N, 2.3776° W
Integration: 24m (144 × 10s)
Software: ZWO Seestar app
Notes: ·
Total effort: 6h over 2 nights
Moon: 🌒Waxing crescent, 9% lit
Plate solve
Centre RA: 7h 29m 15.6s
Centre Dec: +20° 54′ 55″
Field: 42.8′ × 76.1′
Pixel scale: 1.19″/px
Orientation: -137.2° E of N
Hemisphere: Northern

Also in this frame

C39

Catalogued objects inside the plate-solved field, nearest the centre first. Highlighted names have their own photo here.

TelescopeZWO Seestar S50

CameraZWO Seestar S50 Camera

RigFamily Holiday Rig

Where to find it

Finder chart

Star field and catalogued objects inside the plate-solved field, oriented to the solve. Fully offline, from the bundled star and deep-sky catalogues.

Interactive sky chart centred on 7 29 15.6 +20 54 55. Drag to pan, scroll to zoom, click a star or object to identify it. Zoom in to the plate-solved field for the DSS survey photo; zoom out for constellation figures and neighbouring catalogue objects. Fully self-hosted: the star and deep-sky catalogues and the survey image are all served from this site, so nothing external loads. Imagery: DSS2 colour (STScI / POSS-II). Constellation figures © Dominic Ford (GPLv3).

Captured from · Telford, UK

52.7618° N, 2.3776° W · view on OpenStreetMap ↗ · Place data © GeoNames (CC BY)

Frequently asked questions

What kind of object is C 39?

C 39 is a planetary nebula.

Which constellation is C 39 in?

C 39 lies in the constellation Gemini.

How far away is C 39?

The light in this image left C 39 roughly ~6,500 years ago, so that is how far back in time you are seeing it.

What are the coordinates of C 39?

C 39 sits at right ascension 07h 29m 16s and declination +20° 54′ 55″ (J2000).

When is the best time to photograph C 39?

C 39 rides highest in the evening sky around January, reaching about 58° above the horizon from around 53°N.

What equipment was used to photograph C 39?

This image of C 39 was captured with ZWO Seestar S50 and ZWO Seestar S50 Camera.

How much exposure time went into this image?

This image of C 39 represents 24m (144 × 10s) + 84m (507 x 10s) of total integration time.

Eskimo Nebula

Where to find it

Frequently asked questions

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