|Discovered by||Alexandre Schaumasse|
|Discovery date||1 December 1911|
|1911 X1, 1919 U1|
|Orbital characteristics A|
|Epoch||11 May 2001|
|Semi-major axis||4.08 AU|
|Orbital period||8.247 yr|
9 August 2009|
|Next perihelion||16 November 2017|
By the end of 1912 it was recognised as a short period comet estimated to return in 7.1 years, later recalculated as 8 years. The 1919 return was recovered by Gaston Fayet (Paris, France) as magnitude 10.5.
The comet was missed in 1968 and 1976. It was speculated that the increase in brightness in 1952 indicated a problem that led to it vanishing. In 1984, Elizabeth Roemer (Steward Observatory, Arizona, USA) found an image on photographs from 1976. The approach later that year, observed by James B. Gibson (Palomar Observatory, California, USA) and orbital calculations by Brian G. Marsden, confirmed the 1976 image was Comet Schaumasse. The comet has not been observed since 2001. The comet was not observed during the 2009 unfavorable apparition since the perihelion passage occurred when the comet was on the far side of the Sun.
- Ley, Willy (September 1968). "Mission to a Comet". For Your Information. Galaxy Science Fiction. pp. 101–110.
- Seiichi Yoshida (2009-04-07). "24P/Schaumasse". Seiichi Yoshida's Comet Catalog. Retrieved 2010-02-24.
- "JPL Small-Body Database Browser: 24P/Schaumasse". Jet Propulsion Laboratory. 2001-07-23. Retrieved 2010-02-25.
- Kronk, Gary W. (2001–2005). "24P/Schaumasse". Retrieved 2007-01-31. (Cometography Home Page)
- "JPL Close-Approach Data: 24P/Schaumasse". 2001-07-23. Retrieved 2009-05-06.
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 24P/Schaumasse – Seiichi Yoshida @ aerith.net
- 24P at Kronk's Cometography
- 24P at Kazuo Kinoshita's Comets