@dimkate.bsky.social

@dimkate.bsky.social

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Amateur astrophotographer, especially interested in comets / Ερασιτέχνης αστροφωτογράφος, με ιδιαίτερη αγάπη στους κομήτες

Comet 10P/Tempel features a large green asymmetric coma, about 18 arcminutes across. A faint line runs diagonally across the image and though the nucleus, representing the dust trail of the comet, created by accumulated dust from past apparitions. To the right of the nucleus and below the dust trail is visible a faint tail. The image follows the movement of the comet, with the stars appearing as trails. Equipment: GSO N203/800 with TS GPU coma corrector, Prometheus Astro Tyr mount, Touptek 294MC-Pro, 2" UV/IR filter by Pegasus astro, Svbony 30mm f/4 guidescope with SV305 camera, controlled via Stellavita. Image acquired on 20 July 2026, at 0:00 UTC. 115x60s light frames. From the B4-B4.5 skies of eastern Crete. Edited with DSS and SIRIL.
A comet visible in a starry field. The comet has a bright nucleus and an off center green coma. Maybe a faint tail is barely visible towards the right. The brighter stars have four spikes. Equipment: GSO N203/800 with TS GPU coma corrector, Prometheus-astro Tyr mount, Touptek 294C-Pro camera, pegasus-astro 2" UV/IR filter. Controlled via Stellavita. 49x60s light frames obtained on 21 June 2026, around 23:00 UTC, from Bortle 4 skies in eastern Crete. Edited with DSS, SIRIL and GIMP.
A comet moving among the stars. It has a round green coma (about 3.5' across), a parabolic dust coma and a short dust tail. Equipment used: GSO N203/800 with TS GPU coma corrector, Prometheus astro Tyr mount, Touptek 294C-Pro, Pegasus astro 2" UV/IR filter. Control via Stellavita. 28x30s (total exposure time 14 minutes), starting on 6 June 2026, 1:00 UTC. Moon at 70% (waning gibbous). Image obtained from eastern Crete. Edited with DSS, SIRIL and GIMP.
A spiral galaxy seen edge-on, with a dust lane visible running along its length. An arrow points to supernova SN 2026kid, which appears like a star embeded near the dust lane of the galaxy, south of the nucleus. Equipment: GSO N203/800 with TS GPU coma corrector, Prometheus-astro Tyr mount, Touptek 294C camera, pegasus-astro 2" UV/IR filter. Controlled via Stellavita. 151x60s light frames obtained on 7 May 2026 from Bortle 4 sky in eastern Crete. Edited with DSS and SIRIL.
A comet with a round, bright green coma and a long, structured tail with knots and streamers extending beyond the edge of the frame. There is also a short dust tail. Equipment: 8-inch f/4 newtonian telescope, 294MC-Pro, guided Prometheus-astro tyr, controlled by StellaVita. 30x30s, with moonlight interfering. Sitia, Crete. Edited with DSS, SIRIL and Ps.
A comet appearing like a bright teardrop with long tail is approaching the blocked Sun from the left. The image is from the CCOR1 instrument on board GOES 19, 6:45 UT. https://ccor.nrl.navy.mil/ccor_realtime/last_image_MinBckgnd.png
Comet C/2025 R3 (PanSTARRS) on 29 March 2026, 2:45 (UTC). The comet has features a round, green coma and a nice ion tail, over a degree long, extending beyond the edge of the frame. Coma is about 7 arcminutes across. The two brightest stars visible are 40 and 41 Pegasi. GSO N203/800 with coma corrector, unmodified M4/3 camera. 50x30s from B4 skies, eastern Crete. Edited with DSS, SIRIL and Ps.
A comet with round green coma (up to 9' across) and a short whiteish tail in front of a starry field. Some distant galaxies are also visible at the bottom. Equipment: GSO N203/800 with TS GPU coma corrector, Prometheus astro TYR mount, Toupket 294C-Pro, SV305c guide camera with 30mm f/4 guidescope, Stellavita astrostation. 83x60s light frames, from eastern Crete (B4.5). Edited with DSS and SIRIL. Star stack and comet stack combined in GIMP. Some final touches with Ps.
A small comet with round coma, condensed nucleus and a hint of tail towards the left is seen moving among the stars. Equipment used: GSO N203/800 with TS GPU coma corrector. 58x30s from B3 skies of eastern Crete. Edited with DSS and SIRIL, image is cropped.
Comet C/2024 E1 (Wierzchos) on 24 February 2026, 5:30 (UTC), from eastern Crete. There is a faint ion tail (40' long) and the dust tail (10' long) is also visible. The green coma is 6' across. Equipment: GSO N203/800 with coma corrector, unmodified Olympus E-PL5. 35x30s frames, under the first quarter Moon. Comet stack from DSS, edited with SIRIL. North is down, east is to the right.
An elongated green diffuse object (the comet) is visible in the centre, in front of a starry field, on 14 Febuary 2026, 3:50 UTC. Equipment: GSO N203/800 with coma corrector, unmodified Olympus E-PL5. 28x30s light frames. Edited with DSS and SIRIL. Image is cropped (fov about 33x25 arcmin).
A collage of the six of the most interesting or just photogenic comets of 2025. All images by me.
A gasy comet, appearing as an elongated green blob, is moving in front of a group of galaxies, with a face on spiral galaxy, Messier 100, dominating the view. The edge-on galaxy near the comet is NGC 4312. There is a hint of a faint tail towards 2° clock from the comet. Equipment: GSO N203/800 with TS GPU coma corrector, unmodified M4/3 MILC. 51x40s (34 minutes of total exposure), starting on 00:30 UTC, 26 December 2025, from Eastern Crete (B4 sky). Edited with DSS and SIRIL.
A comet with round green coma, about 9' across, and a short, faint spiky ion tail. The image is stacked on the comet, with the stars appearing as trails. Equipment: GSO N203/800 with TS GPU cc, unmodified M4/3 camera. 194x30s (total exposure time 1 hour 37 minutes) from B4 skies of eastern Crete. Edited with DSS and SIRIL. Image is cropped.
A comet among the stars. The comet is visible to the left and has a tail pointing towards the left. Some distant galaxies are also visible (like spiral galaxies NGC 3356 and NGC 3362 towards the right). The image was obtained with an 8-inch f/4 telescope and an unmodified M4/3 camera. 63x30s images edited with DSS, SIRIL and GIMP.
A yellowish comet among the stars with a round coma and a faint tail extending towards the right and top. Image from December 1, 2025. Equipment: 8-inch f/4 corrected telescope with M4/3 censor (image cropped). 33x30s, edited with DSS and SIRIL.
Pseudochrome image with the darkest parts painted purple and brightest red. The image shows the central region of comet, showing three discrete nucleii, and part of its tail. Image from 20 November 2025, taken with an 8-inch f/4 newtonian telescope and an unmodified M4/3 camera. 38x30s frames edited with DSS and SIRIL.
A comet moving slowly in front of the stars. There is a fragment visible to the right and below of the nucleus. Shot through an 8-inch f/4 newtonian telescope and an unmodified M4/3 camera. 30x30s frames edited with DSS and SIRIL. Image is from 24 November 2025.
A green comet in front of star trails. Towards the top right extends a faint tail and a short one towards the opposite direction. Equipment: GSO N203/800 with TS GPU cc. Unmodified Olympus E-PL5. 76x30s frames from B4 skies. Edited with DSS and SIRIL.
A comet with green round coma and a short tail. Equipment: GSO N203/800 with TS GPU coma corrector, and unmodified Olympus E-PL5. 66x30s acquired around 1:45 UTC, 29 October 2025 from Crete. Edited with DSS and SIRIL, this is the comet stack, with the stars appearing as trails. North is up.
A comet with white coma, about 2' across, and a yellowish thin tail with extends beyond the edge of the frame. A faint dust tail is also visible. The image is stacked on the comet and the stars appear as trails. Equipment: GSO N203/800 with TS GPU CC, unmodified Olympus E-PL5, AZEQ5 62x30s ISO 1600 frames, acquired on 29 October 2025, around 3:20 UTC, from B4 skies of eastern Crete. Edited with DSS, SIRIL and GIMP.
Comet Lemmon, showing the slightly curved and broad dust tail, the ion tail, with knots and disconnections, and the green coma is still visible. Samyang 135mm f/2 wide open, unmodified Olympus E-PL5. 23x15s+1x25s (total exposure time 6m10s), from Eastern Crete. Edited with DSS, GraXpert, and Ps.
Wide view of the starry sky but clouds are creeping in. The Corona Borealis is the most striking feature of that region of the sky. Below it, in between the clouds is visible comet Lemmon, with its tail. OM-5 camera with the Panasonic 20mm f/1.7 open at f/1.8 untracked. Single 10s image sooc.
A green comet with round coma and faint thin tail is visible to the bottom left. The coma is 10-11' across and the tail 15-20' long. To the right is visible a pinkish nebula, known as the Eagle Nebula. The starry background also has dark nebulas and star clusters. TS Optics 70mm f/6 ED douplet with 0.8 reducer, unmodified Olympus E-PL5. 50x60s frames from B3 skies of Eastern Crete. Edited with DSS, SIRIL, GIMP and Ps.
Comet C/2025 A6 (Lemmon) on the early hours of 17 October 2025 (around 3:00 UTC) crossing Canes Venatici, with the galaxies M94, M63 and NGC 5005 and 5033 visible. The ion tail extends beyond the edge of the frame with streamers and knots and the dust tail is also quite prominent, about 4° long and slightly curved. 55x25s, ISO 1600 frames, Samyang 135mm @f/2 and unmodified Olympus E-PL5. From B4 skies of eastern Crete. Edited with DSS, SIRIL and GIMP.
A comet with a tail among the stars. The green gasy coma is about 10 arcminutes across. The ion tail extends beyond the edge of the frame. Equipment: GSO N203/800 with TS GPU cc, AZ-EQ5, unmodified Olympus E-PL5. Exposure: 100x30s, from B4 skies of eastern Crete. Edited with DSS, SIRIL and GIMP.
Image of a comet among the stars. Image is stacked on comet so the stars appear as lines. The comet has an green coma and a faint ion tail. Equipment: TS Optics 70mm f/6 ED with 0.8 reducer and unmodified Olympus E-PL5. 55x10s and 16x4s (total exposure is about 10 minutes). Location: Eastern Crete, near Toplou Monastery. Stacked with DSS and SIRIL. Image is cropped.
Image of comet C/2025 A6 (Lemmon) stacked on the comet, leading to trals appear as trails. Bright green coma, dust tail and a thin and dimmer ion tail is also visible up to the edge of the frame. Equipment: GSO N203/800 with TS GPU cc, AZEQ5, unmodified Olympus E-PL5. 106x30s ISO 1600 frames, from B4 skies of Eastern Crete. Edited with DSS and SIRIL.
Comet stack of comet C/2025 A6 (Lemmon) - the comet is static while the stars appear as trails. The ion tail appears to be bifurcate and there is also a faint dust tail. Photo taked with a GSO N203/800 telescope and an unmodifed Olympus E-PL5 camera. 103x30s frames. Edited with DSS and SIRIL.
A small dusty comet (240P?NEAT) and a few stars. 23 September 2025, 2:15 UTC. GSO N203/800 telescope with coma corrector, unmodified Olympus E-PL5. 46x30s from eastern Crete, B4.5. Edited with DSS and SIRIL.
A small fuzzy dot among star trails. GSO N203/800 telescope with TS GPU coma corrector. Unmodified Olympus E-PL5 camera. 45x30s, from when the comet was 10 degrees above the horizon and up to into the nautical twilight. Edited with DSS and SIRIL.
Image of comet C/2025 A6 (Lemmon) moving among the stars. The comet features a bright green coma and a very faint ion tail. Equipment used: GSO N203/800 with TS GPU cc, unmodified Olympus E-PL5. 95x30s ISO 1600 light frames. Stacked with DSS and edited with SIRIL.
A comet with green round coma moving in front of the star, which appear as trails. GSO N203/800 telescope and unmodified Olympus E-PL5. Image is cropped. 78x30s, from B4.5, eastern Crete. Edited with DSS and SIRIL.
A green comet with round coma among star trails. An extremely faint tail is barely visible at ~70° PA. Equipment: GSO N203/800 with TS GPU cc, AZ-EQ5, unmodified Olympus E-PL5. Exposure: 30x40s and 21x30s (total exposure time 40m30s), from B3 skies. Edited with DSS and SIRIL.
Stretched image of C/2025 A6, showing the inner bright coma and an outer faint coma. 23x30s, 20cm f/4 telescope. Bortle 4.5. Edited with DSS and SIRIL.
A green round comet among the stars. Equipment used: GSO N203/800 with TS GPU cc, umodified Olympus E-PL5. 61x40s, edited with DSS, SIRIL and GIMP. Image is cropped (48'x36').
A small comet with green coma in a starry field. Shot with a TS Optics 70mm f/6 ED douplet with 0.8 reducer. 59x20s frames. Edited with DSS and SIRIL.
A small comet with dusty tail passing through a starry field. Acquired with a GSO N203/800 telescope with TS GPU coma corrector. Unmodified Olympus E-PL5. 80x30s ISO 1600 light frames. Edited with DSS, SIRIL and GIMP.
A group of amateur astronomers with theis telescopes (two neutonian telescopes in the foreground). The scene is illuminated by a red light. Milky Way is visible in the background. Single 20s exposure, f/4, ISO 2000, ultrawide view (16mm eq).
The small comet is moving quickly is respect with background stars. It features a narrow tail making it look like a pin. Equipment: GSO N203/800 telescope with TS GPU coma corrector. Unmodified Olympus E-PL5 camera. 100x30s light frames stacked in DSS and edited with SIRIL.
The Cocoon Nebula appears as an almost circular pink bright area in the middle of a starry field. Some dark lanes are visible in it, as well as a central star. Aquaired with a 8inch f/4 telescope with coma corrector. 368*40s light images. Edited with DSS, SIRIL and starnet ++
Image of the large spiral galaxy Messier 101, showing some of its fainter features, like the open faint spiral towards the north (up in the image). Small companion galaxy NGC 5477 is visible to the right. 8-inch f/4 telescope on an EQ mount, imaged with unmodified mirroless camera. 145 frames were stacked in DSS, for a total exposure time of 1 hour 39 minutes and 30 seconds. The processing was tricky because the stacked image had a weird greenish cast.
A black and white inverse image of a comet moving in front of the background stars. Motion centred on the comet. A thin tail with some structure visible emerges from the round coma. Total exposure time 21 minute and 30 seconds. Focal length: 800 mm, f/4. 2:11 UTC to 2:42 UTC, 7/4/2025.
A comet with a bright green round coma is moving in front of the stars that appear as lines of light. A faint narrow tail is seen extednding to top right, up to the edge of the frame
A spiral galaxy with well defined arms is visible in a starry field. The brightest stars have spikes as an 8-inch newtonian telescope was used. The galaxy is about 30 million light years away so it occupies just a small part of the image.