,_31_July.jpg) Comet Borrelly–Brooks photographed by H. K. Palmer on 31 July 1900 | |
| Discovery | |
|---|---|
| Discovered by | Alphonse Borrelly William R. Brooks |
| Discovery date | 23 July 1900 |
| Designations | |
| Alternative designations | 1900b 1900 II |
| Orbital characteristics | |
| Epoch | 15 August 1900 (JD 2415246.5) |
| Observation arc | 94 days |
| Number of observations | 121 |
| Perihelion | 1.015 AU |
| Eccentricity | 1.00032 |
| Orbital period | ~66,000 years (inbound) |
| Inclination | 62.533° |
| Longitude of ascending node | 329.41° |
| Argument of periapsis | 12.423° |
| Last perihelion | 3 August 1900 |
| Earth MOID | 0.0154 AU |
| Jupiter MOID | 3.0621 AU |
| Physical characteristics | |
| Comet total magnitude (M1) | 5.0 |
| Comet nuclear magnitude (M2) | 8.0 |
| Apparent magnitude | 8.64 (1900 apparition) |
Comet Borrelly–Brooks, formal designation C/1900 O1, is a hyperbolic comet that was seen throughout the latter half of 1900.
Discovery and observations
French astronomer Alphonse Borrelly was the first person to discover the comet on the early morning of 24 July 1900, while William Robert Brooks independently spotted the same comet about 15 minutes later. They reported the comet as a 9th-magnitude object with a short tail located within the constellation Aries. A day later, H. K. Palmer started to take a series of photographs of the comet itself for the remainder of the month.
Robert G. Aitken was the last astronomer to observe Comet Borrelly–Brooks as it faded to a 15th-magnitude object within the constellation Ursa Minor on 23 December 1900.
Orbit
Charles D. Perrine and others calculated the first parabolic trajectory of the comet, concluding that it reached perihelion on 3 August 1900. In 1903, Manuel de Simas later revised it to a hyperbolic trajectory. J. M. Poor found that the comet had accelerated during its inbound flight to the Sun in 1900, with Brian G. Marsden and Ichiro Hasegawa later calculating this original trajectory had an orbital period of 66,000 years before it was ejected from the Solar System.
Possible meteor shower
Due to the comet's very small minimum orbit intersection distance with Earth, around 0.015 AU (2.2 million km) away, it is theorized that this comet is a potential parent body of a meteor shower that should appear 21 August of each year from a radiant in the direction of the constellation Hydrus. However, no associated meteor shower has yet been found.
References
Notes
Citations
- ^ H. K. Palmer (1901). "Photographic Observations of Comet II, 1900 (Borrelly–Brooks)" (PDF). Publications of the Astronomical Society of the Pacific. 13 (78): 48–51. Bibcode:1901PASP...13...48P. doi:10.1086/121418. JSTOR 40671436.
- "Comet Names and Designations". International Comet Quarterly. Retrieved 3 January 2025.
- "C/1900 O1 (Borrelly–Brooks) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 24 November 2023.
- ^ G. W. Kronk (2007). Cometography: A Catalog of Comets. Vol. 3: 1900–1932. Cambridge University Press. pp. 3–8. ISBN 978-0-521-58506-4.
- R. G. Aitken (1901). "Observations of Comet 1900b". Astronomical Journal. 21 (490): 80. Bibcode:1901AJ.....21...80A. doi:10.1086/103261.
- R. T. Crawford; C. D. Perrine (1900). "Comet b, 1900 (Borrelly–Brooks)" (PDF). Publications of the Astronomical Society of the Pacific. 12 (75): 204. JSTOR 40668090.
- M. De Simas (1903). Definitive Orbit Elements of Comet 1900 II. Astronomische Nachrichten. ISBN 978-1-247-73236-7.
- J. M. Poor (1903). "Orbit of Comet 1900 II". Astronomical Journal. 23 (548): 183–188. Bibcode:1903AJ.....23..183P. doi:10.1086/103509.
- M. Davidson (1920). "Cometary Radiant Points, 1875–1920" (PDF). Monthly Notices of the Royal Astronomical Society. 80 (8): 739–741. Bibcode:1920MNRAS..80..739D. doi:10.1093/mnras/80.8.739.
External links
- C/1900 O1 at the JPL Small-Body Database
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