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Revision as of 09:41, 12 January 2025 by KyloRen2017 (talk | contribs) (→Observational history: Discovery and follow-up observations)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff) Lost comet| Discovery | |
|---|---|
| Discovered by | Toshio Haneda José S. Campos |
| Discovery site | Fukushima, Japan Durban, South Africa |
| Discovery date | 1 September 1978 |
| Designations | |
| Alternative designations | 1978j 1978 XX |
| Orbital characteristics | |
| Epoch | 28 September 1978 (JD 2443773.5) |
| Observation arc | 122 days |
| Earliest precovery date | 9 August 1978 |
| Number of observations | 62 |
| Aphelion | 5.479 AU |
| Perihelion | 1.101 AU |
| Semi-major axis | 3.290 AU |
| Eccentricity | 0.66524 |
| Orbital period | 5.968 years |
| Inclination | 5.947° |
| Longitude of ascending node | 132.25° |
| Argument of periapsis | 240.46° |
| Last perihelion | 9 October 1978 (observed) 17 April 2023 (calculated) |
| Next perihelion | 18 September 2029 (calculated) |
| TJupiter | 2.763 |
| Earth MOID | 0.135 AU |
| Jupiter MOID | 0.331 AU |
| Physical characteristics | |
| Comet total magnitude (M1) | 12.8 |
| Comet nuclear magnitude (M2) | 18.0 |
| Apparent magnitude | 9.0 (1978 apparition) |
Comet Haneda–Campos, formally designated as D/1978 R1, was a periodic comet with a 5.97-year elliptical orbit around the Sun. It was never successfully recovered during its 1984 and 1991 apparitions, and is now considered lost.
Observational history
Discovery
The comet was independently discovered by Toshio Haneda and José da Silva Campos about nine hours apart from each other on the night of 1 September 1978. At the time of discovery, the comet was a diffuse 9th-10th magnitude object within the constellation Microscopium. Their discovery were later reported by John C. Bennett on 5 September 1978.
Follow-up observations
Precovery images of the comet were found to have been taken between 9 and 11 August 1984, from the Perth and Palomar observatories, which enabled Brian G. Marsden to refine the orbital calculations for the comet. Based on Marsden's calculations, the comet made two close encounters with Jupiter in 1957 and 1969, where the comet approached at a distance of 0.3–0.4 AU (45–60 million km) from the giant planet.
The comet made its closest approach with Earth at a distance of 0.154 AU (23.0 million km) on 9 September 1978. It remained as a 10th-magnitude object at the time of its closest Earth encounter, leading to astronomers to indicate that the comet was indeed an intrinsically faint object. It rapidly faded away throughout late September and October, until it was last seen as an 18th-magnitude object on 29 November 1978.
Recovery efforts
Brian G. Marsden and Shuichi Nakano independently calculated the comet's next perihelia by using 24–55 positions recorded between July and November 1978, and both predicted the comet's return on 1984 and 1991 respectively. However, astronomers failed to recover the comet on both apparitions. It is theorized that the comet was at an outburst during its discovery, and is actually usually fainter than what was observed in 1978.
On 24 December 1984, a faint comet-like object was spotted by Tsutomu Seki, where he initially thought it was the same comet as Haneda–Campos. However, subsequent orbital calculations of this object does not match that of D/1978 R1, despite their initially similar apparent motion. As of 2025, the comet remains lost, though the search continues as it approaches its next perihelion in 2029, where it is expected to make another close approach to Earth like it did in 1978.
Meteor shower
References
Notes
- Reported initial positions upon discovery were: α = 20 51 , δ = –29° 27′ (Haneda) and α = 20 51 , δ = –29° 40′ (Campos)
Citations
- ^ B. G. Marsden (5 September 1978). "Comet Haneda–Campos (1978j)". International Astronomical Union Circular. 3259.
- "Comet Names and Designations". International Comet Quarterly. Retrieved 10 January 2025.
- ^ S. Yoshida (6 January 2024). "D/1978 R1 (Haneda–Campos)". Retrieved 12 January 2025.
- ^ "D/1978 R1 (Haneda–Campos) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 12 January 2025.
- ^ G. W. Kronk. "D/1978 R1 (Haneda–Campos)". Cometography.com. Retrieved 12 January 2025.
- ^ B. G. Marsden (8 September 1978). "Periodic Comet Haneda–Campos (1978j)". International Astronomical Union Circular. 3262.
- ^ B. G. Marsden (19 September 1978). "Periodic Comet Haneda–Campos (1978j)". International Astronomical Union Circular. 3271.
- B. G. Marsden (14 September 1978). "Periodic Comet Haneda–Campos (1978j)". International Astronomical Union Circular. 3267.
- G. W. Kronk (2010). Cometography: A Catalog of Comets. Vol. 5: 1960–1982. Cambridge University Press. pp. 610–613. ISBN 978-0-521-87226-3.
- D. Machholz (1985). A Decade of Comets: A Study of 33 Comets Discovered by Amateur Astronomers between 1975–1985 (PDF) (3rd ed.). pp. 28–29. ISBN 0-9646487-0-9.
- T. Seki (2005). "Memorable Comets: D/1978 R1 (Haneda–Campos)". Retrieved 12 January 2025.
- J. S. Campos; et al. (8 October 2021). "16 new asteroids identified as comets". Zooniverse.org. Retrieved 12 January 2025.
External links
- D/1978 R1 at the JPL Small-Body Database
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