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2. Comet ISON - Wikipedia

   en.wikipedia.org/wiki/Comet_ISON

   The Spitzer Space Telescope (SST) observed Comet ISON on 13 June and estimated carbon dioxide outgassing at about 1 million kilograms (2.2 million pounds) per day. [44] From 5 June to 29 August 2013, Comet ISON had an elongation less than 30° from the Sun. [45] No obvious rotational variability was detected by either Deep Impact, HST, or Spitzer.

3. P/2015 PD229 (Cameron–ISON) - Wikipedia

   en.wikipedia.org/wiki/P/2015_PD229_(Cameron–ISON)

   P/2015 PD 229 (Cameron–ISON) is a periodic comet that was initially thought to be an active centaur upon discovery. It orbits the Sun between Jupiter and Saturn once every 19.2 years, and has appeared to have made several close encounters with the giant planets from 1889 to 1949. [ 4 ]

4. C/2024 G3 (ATLAS) - Wikipedia

   en.wikipedia.org/wiki/C/2024_G3_(ATLAS)

   C/2024 G3 (ATLAS) is a long-period, sungrazing comet, which will reach perihelion on 13 January 2025, at a distance of 0.09 AU from the Sun.It could become the brightest comet of 2025, [4] possibly exceeding apparent magnitude of −3.5.

5. List of hyperbolic comets - Wikipedia

   en.wikipedia.org/wiki/List_of_hyperbolic_comets

   By definition, a hyperbolic orbit means that the comet will only travel through the Solar System once, with the Sun acting as a gravitational slingshot, sending the comet hurtling out of the Solar System entirely unless its eccentricity is otherwise changed. Comets orbiting in this way still originate from the Solar System, however.

6. List of Solar System objects by greatest aphelion - Wikipedia

   en.wikipedia.org/wiki/List_of_Solar_System...

   Due to the changing orbit, it's necessary to provide a calculation of the orbit of the comet (or similarly orbiting body) both before and after entering the inner Solar System. For example, Comet ISON was ~312 au from the Sun in 1600, and its remnants will be ~431 au from the Sun in 2400, both well outside of any significant gravitational ...

7. List of comets by type - Wikipedia

   en.wikipedia.org/wiki/List_of_comets_by_type

   This is a list of comets (bodies that travel in elliptical, parabolic, and sometimes hyperbolic orbits and display a tail behind them) listed by type. Comets are sorted into four categories: periodic comets (e.g. Halley's Comet), non-periodic comets (e.g. Comet Hale–Bopp), comets with no meaningful orbit (the Great Comet of 1106), and lost comets (), displayed as either P (periodic), C (non ...