Ernesto Guido

@comets77

Italian amateur astronomer whose main interests lie in the astrometry and physical properties of comets

Italy
Vrijeme pridruživanja: lipanj 2009.

Medijski sadržaj

  1. 18. sij

    At 2130UTC of 2020-01-17, a was detected just north of Puerto Rico (5:31pm local time). Video via - Satellite image available here:

  2. 6. sij

    New Comet C/2019 Y1 (ATLAS), imaged from a dark Chilean sky and a 0.61-m f/6.5 reflector + ccd - Thanks to remote facility cc

  3. 19. pro 2019.

    "Evolving Coma Morphology of Interstellar Comet 2I/Borisov with Deep HST Imaging" by Bryce T. Bolin

  4. 16. pro 2019.

    "Hubble Watches Interstellar Comet Borisov Speed Past the Sun" - Hubble images show that its nucleus is more than 15 times smaller than earlier investigations suggested it might be. The radius is smaller than half a kilometre.

  5. 12. pro 2019.

    "The Nucleus of Interstellar Comet 2I/Borisov" by Jewitt et al. - "We used the Hubble Space Telescope to observe interstellar comet 2I/(2019 Q4) Borisov. Three independent constraints show that the nucleus is a sub-kilometer body"

  6. 10. pro 2019.

    Interstellar Comet 2I/Borisov imaged few hours ago (2019, Dec. 10.29) from a dark Chilean sky and a 0.61-m f/6.5 reflector + ccd (its closest approach to the sun was on Dec. 8). Thanks to remote facility

  7. 7. pro 2019.

    Giovanni Sostero (18 March 1964 – 6 December 2012). Remembering a Great Friend and a Great Astronomer - In Memoria di un Grande Amico e un Grande Astronomo

  8. 2. pro 2019.
  9. 2. pro 2019.

    "Rooftop Astronomy” by is this week’s cover for magazine

  10. 2. pro 2019.

    RIP Astronomer Michael Clark (1942 - 2019). Discoverer of comet 71P/Clark in 1973 at the Mt John University Observatory, passed away in Melbourne, Australia. via

  11. 27. stu 2019.

    Six years ago, I sent Pynchon into space! "Asteroids named after Thomas Pynchon & Stabia" #152319

  12. 15. stu 2019.

    New papers on interstellar comet 2I/Borisov: "Pre-discovery Activity of New Interstellar Comet 2I/Borisov Beyond 5 AU" by et al. & "Sublimation of water ice....near the nucleus of 2I/BORISOV?" by Z. Sekanina

  13. 31. lis 2019.

    BRIGHT NOVA SCUTI 2019 - Image & animation from the dark sky of Chile thanks to remote facility

  14. 28. lis 2019.

    Beautiful images from SPHERE of the fourth biggest asteroid, Hygiea, found a big surprise: an almost spherical shape. It was hit in the past by a big impact which shattered and reassembled it while still fluid. Vernazza et al: via

  15. 21. lis 2019.

    "Are 2I/Borisov and Oort Cloud Comets Alike?" by Zdenek Sekanina

  16. 19. lis 2019.

    On the cover of last issue of the "The Astronomer" magazine with my follow-up image of interstellar comet 2I/Borisov

  17. 17. lis 2019.

    Interstellar Comet 2I/BORISOV imaged by Hubble Space Telescope via &

  18. 11. lis 2019.

    Blog updated with a selection of comets imaged from the dark sky of Chile thanks to remote facility

  19. 8. lis 2019.

    Comet C/2016 M1 (PANSTARRS) imaged on 2019, Oct 06.34 remotely from a dark Chilean sky and a 0.61-m f/6.5 reflector + CCD

  20. 8. lis 2019.

    Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov) by D. Jewitt & J. Luu /2019 Q4

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