Great Comet of 1901
Semi-major axis n/a | | |
| Eccentricity | 1.0 | |
|---|---|---|
| Orbital period | n/a | |
| Inclination | 131.0770° | |
| Last perihelion | April 24, 1901 | |
| Next perihelion | n/a | |
The Great Comet of 1901, sometimes known as Comet Viscara,
Discovery and observations
In the pre-dawn of 12 April 1901 there was a naked-eye discovery of the comet by Viscara, the manager of an estancia in the Departamento de Paysandú, Uruguay.[3] In the pre-dawn of April 23 the comet was observed in Queenstown, South Africa and on April 24 by David Gill and Robert Innes at the Royal Observatory, Cape of Good Hope; the tail was then about 10° long.[4] On April 24 the comet was also observed at Cape Leeuwin in Western Australia. At the Sydney Observatory on April 25, H. C. Russell found the tail to be about 2° long.[5]
When the comet's brightness reached a maximum on May 5, the tail had fanned out with a weak plasma tail about 45° long and a curved dust tail about 15° long.[4] On May 5 the comet's brightness reached magnitude 1 or perhaps brighter.[6] According to some observers (of the nucleus viewed telescopically following sunrise) the brightness might have reached magnitude −1.5.[7] From naked-eye observations on May 5 there were at least two reports of aurora-like undulations in the tail.[8]
The comet was readily visible to the naked eye until about May 20 and visible by telescope until October.[9]
Orbit
Using 160 observations over 43 days, Charles J. Merfield (1866–1931)
Tebbutt's summary
In the section of his Astronomical Memoirs entitled 1901, Tebbutt wrote:[13]
... During the dark hours it was a striking and beautiful object. In addition to the principal or bright tail, a secondary and much longer but fainter one made an angle with it toward the south of about 35 or 40 degrees. Altogether the comet was observed at Windsor on thirty-two evenings. It was seen in the southern hemisphere only, and the only other observatories taking part in the work were the Royal Observatory, Cape Town, the Argentine National Observatory, Cordoba, and the Government Observatory at Perth, Australia. According to the definitive orbit calculated by Mr. Merfield, who also contributed a few observations himself, the comet arrived in perihelion on April 24 at a distance of 23 millions of miles from the sun. At the time of the first Windsor observation, May 3, the comet was distant 79 millions of miles from us, but by June 13, when my last observation was obtained, it had receded to a distance of 193 millions of miles. The orbit is sensibly parabolic. ...
References
- ^ Sobre el descubrimiento del Cometa 1901a
- ISBN 9780387095134.
- .
- ^ .
- ^ "The Comet. Interview with Mr. Russell". Evening News (Sydney, New South Wales). 26 April 1901.
- ^ Yeomans, Donald K. "NASA JPL Solar System Dynamics: Great Comets in History". nasa.gov.
- ISBN 978-0-521-89935-2.
- ^ The Observatory. Editors of the Observatory. 1901. pp. 294–.
- ISBN 978-3-319-01774-7.
- doi:10.1071/AS99212.
- ^ "NASA JPL Small-Body Database Browser: C/1901 G1".
- ^ Vitagliano, A. "SOLEX 11.0". Archived from the original on 2008-12-20.
- ^ Tebbutt, John (1908). "1901". Astronomical Memoirs. Sydney. pp. 104–105.
{{cite book}}: CS1 maint: location missing publisher (link) (Note that 23 million miles = .2474 AU.)
External links
- THE BRIGHT-COMET CHRONICLES by John E. Bortle, 1998
- Hamacher, Duane W.; Norris, Ray P. (2011). "Comets in Australian Aboriginal Astronomy". Journal of Astronomical History and Heritage. 14 (1): 31. Bibcode:2011JAHH...14..242H, [CORRIGENDUM]).
- C/1901 G1 at the JPL Small-Body Database
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