Halley-type comet in the context of Damocloid

👉 Halley-type comet in the context of Damocloid

Damocloids are a class of minor planets such as 5335 Damocles and 1996 PW that have Halley-type or long-period highly eccentric orbits typical of periodic comets such as Halley's Comet, but without showing a cometary coma or tail. David C. Jewitt defines a damocloid as an object with a Jupiter Tisserand invariant (T_J) of 2 or less, while Akimasa Nakamura defines this group with the following orbital elements:

q < 5.2 AU, a > 8.0 AU, and e > 0.75,
or alternatively, i > 90°

However, this definition that does not focus on Jupiter excludes objects such as (127546) 2002 XU93, 2003 WG₁₆₆, and (661238) 2004 DA₆₂.

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Halley-type comet in the context of List of numbered comets

This is a list of periodic comets that were numbered by the Minor Planet Center after having been observed on at least two occasions. Their orbital periods vary from 3.2 to 366 years. As of November 2025, there are 513 numbered comets (1P–513P). There are 440 Jupiter-family comets (JFCs), 50 Encke-type comets (ETCs), 15 Halley-type comets (HTCs), five Chiron-type comets (CTCs), and one long-period comet (153P). 79 bodies are also near-Earth comets (NECs). In addition, eight numbered comets are principally classified as minor planets – five main-belt comets, two centaurs (CEN), and one Apollo asteroid – and display characteristics of both an asteroid and a comet.

Occasionally, comets will break up into multiple chunks, as volatiles coming off the comet and rotational forces may cause it to break into two or more pieces. An extreme example of this is 73P/Schwassmann–Wachmann, which broke into over 50 pieces during its 1995 perihelion.

View the full Wikipedia page for List of numbered comets

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Halley-type comet in the context of Damocloid

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👉 Halley-type comet in the context of Damocloid

Halley-type comet in the context of List of numbered comets