Buntalang Halley
Ang Kometang Halley (opisyal na ipinangalanan bilang 1P/Halley)[kailangan ng sanggunian] ay ang pinaka-kilalang sa mga maikling-periyod na mga buntala at nakikita sa Daigdig kada-75 o 76 na taon.[6]
 | |
| Pagkatuklas | |
|---|---|
| Natuklasan ni | prehistoric (observation); Edmond Halley (recognition of periodicity) |
| Orbital characteristics[2] | |
| Epoch 2449400.5 (17 February 1994) | |
| Aphelion | 35.1 AU (9 December 2023)[1] |
| Perihelion | 0.586 AU last perihelion: 9 February 1986 next perihelion: 28 July 2061[kailangan ng sanggunian] |
| Semi-major axis | 17.8 AU |
| Eccentricity | 0.967 |
| Orbital period | 75.3 a[kailangan ng sanggunian] |
| Inclination | 162.3° |
| Pisikal na katangian | |
| Dimensiyon | 15×8 km,[kailangan ng sanggunian] 11 km (mean)[kailangan ng sanggunian] |
| Mass | 2.2×1014 kg[kailangan ng sanggunian] |
| Mean density | 0.6[kailangan ng sanggunian] (estimates range from 0.2 to 1.5 g/cm3[3]) |
| Sidereal rotation period | 2.2 d (52.8 h) (?)[4] |
| Albedo | 0.04[5] |
| Apparent magnitude | 28.2 (in 2003)[kailangan ng sanggunian] |
Mga sanggunian
baguhin- ↑ [kailangan ng sanggunian]
- ↑ [kailangan ng sanggunian]
- ↑ S. J. Peale (1989). "On the density of Halley's comet". Icarus. 82 (1): 36–49. doi:10.1016/0019-1035(89)90021-3.
densities obtained by this procedure are in reasonable agreement with intuitive expectations of densities near 1 g/cm3, the uncertainties in several parameters and assumptions expand the error bars so far as to make the constraints on the density uniformative ... suggestion that cometary nuclei tend to by very fluffy, ... should not yet be adopted as a paradigm of cometary physics.
{{cite journal}}: CS1 maint: date auto-translated (link) - ↑ S. J. Peale, J. J. Lissauer (1989). "Rotation of Halley's Comet". Icarus. 79 (2): 396–430. doi:10.1016/0019-1035(89)90085-7.
{{cite journal}}: CS1 maint: date auto-translated (link) - ↑ R. R. Britt (29 Nobyembre 2001). "Comet Borrelly Puzzle: Darkest Object in the Solar System". Space.com. Inarkibo mula sa orihinal noong 30 Nobyembre 2001. Nakuha noong 16 Disyembre 2008.
{{cite web}}: CS1 maint: date auto-translated (link) - ↑ G. W. Kronk. "1P/Halley". cometography.com. Nakuha noong 13 Oktubre 2008.
{{cite web}}: CS1 maint: date auto-translated (link)