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The Rosette Nebula (C49) from Lakeway, Texas with a ZWO Seestar S50 Pro — a full ring of red hydrogen filling the middle of the frame around a dark central cavity holding the star cluster NGC 2244, with dark dust globules and lanes threaded through the ring.

C49 — The Rosette Nebula

A living entry: two nights of dual-band light, almost six hours

  • TelescopeEva (ZWO Seestar S50 Pro)
  • Integration352 minutes
  • LocationLakeway, TX
  • SkyBortle 6
  • CapturedOct 23, 2026
  • PhotoKyle Eberly · © 2026
  • ProcessingVersion two, and the filter made the difference. The first version was a 24-minute broadband scouting frame where the ring barely showed. This one is two nights through the dual-band filter, 5.9 hours in all, shot by the telescope robot and aligned star by star before combining, then cleaned with AI noise reduction on the raw data. The whole rose comes up: the ring, the hollow center and the dark globules threaded through it. The broadband frame isn’t mixed in; it was a different filter and would only dilute the hydrogen signal.

What you're looking at

The Rosette is a ring of glowing hydrogen about 130 light-years across, 5,000 light-years away in Monoceros — and the hole in the middle of the rose is real. The young cluster at the center, NGC 2244, formed from this cloud and its hottest stars have spent the last few million years blowing the gas outward, hollowing the cavity they now shine from.

It's the same story as the Heart, the Soul, and the Pacman — a cluster carving its birth cloud — caught at the photogenic moment when the carving has made a near-perfect wreath. The dark threads across the ring are dense dust lanes seen in silhouette, each one a potential nursery for the next generation of stars.

Almost everything the Rosette emits is hydrogen-alpha: one deep-red wavelength, 656 nanometers. That's why the broadband scouting frame showed mostly the cluster, and why the dual-band filter, which passes that wavelength and blocks most of the rest, brings the whole ring up.

The lesson

Version one was twenty-four minutes with the wrong filter, and it was still the right call. The alternative wasn't a better frame. It was no frame, because the night was ending and the Rosette was finally up.

Version two is what happened when the right tool met the right target: same telescope, same backyard, one filter change and a few hours, and the faint blush became a full rose.

Starting badly beats waiting for ideal conditions, provided you're honest about which one you did, and you come back with the right tool.

The same rose, in infrared — NASA’s WISE space telescope

The Rosette Nebula field in infrared from NASA WISE data, placed on the same framing as the backyard photo — billowing orange clouds of warm dust ringing a dark, star-filled central cavity, heaviest across the lower half of the frame.
The identical patch of sky, in heat instead of visible light. Blue is starlight; orange is warm dust. The cavity at the center is just as empty in infrared: the cluster’s light and winds have cleared out the dust along with the gas. The dust piles up thickest across the lower half of the frame, where the rose runs into the larger Monoceros cloud and new stars are still forming. The two small orange shards at left and center are instrument ghosts in the WISE data, not real objects.

Image data: NASA/JPL-Caltech, WISE (ALLWISE atlas tiles), public archive via IRSA. Seven-tile mosaic, reprocessed by Kyle Eberly / Sitreps; the backyard frame was plate-solved against the ESA Gaia catalog to place it.

My telescope
ZWO Seestar S50 Pro — 50 mm lens, visible light, 5.9 hours
This telescope
WISE — a 40 cm space telescope above the atmosphere
The light
3.4, 4.6 and 12 µm infrared — heat the atmosphere never lets through
The data
Seven ALLWISE sky-atlas tiles from NASA’s IRSA archive, plate-solved against the Gaia star catalog so the infrared lands on my exact framing

The Rosette is the cleanest case of the pattern running through this journal: a young cluster hollowing out the cloud it was born from. In visible light you see the glowing gas around the hollow; in infrared you see the dust walls that hold it in.

One photo. One lesson.

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Object data

Catalog
C49 · NGC 2237–2246
Constellation
Monoceros
Type
Emission nebula (H II region)
Distance
~5,000 light-years
Size
~130 light-years — the hole in the middle is real
Central cluster
NGC 2244 — carved the cavity it shines from
Status
LIVING ENTRY — 5.9 hours dual-band over two nights; deepening through the winter

More from the journal

A tall widefield view of Orion’s sword photographed from Lakeway, Texas with a ZWO Seestar S50 Pro: the red and white Orion Nebula with its small round companion M43 in the lower half, the faint Running Man Nebula and the star cluster NGC 1981 above it, and the bright star Iota Orionis below.
The Orion Nebula
A widefield view in Orion photographed from Lakeway, Texas with a ZWO Seestar S50 Pro: the Flame Nebula glowing orange-red at left with dark dust lanes through it, the bright star Alnitak above center, and the dark Horsehead silhouette against a red curtain of hydrogen at right.
The Horsehead and the Flame
The Horsehead Nebula photographed from Lakeway, Texas with a ZWO Seestar S50: a dark horse-head silhouette of dust rising from a black cloud against a glowing red curtain of hydrogen, with the bright belt star Alnitak at upper left and the small glowing nebula NGC 2023 in the dark cloud below it.
Barnard 33