C/1907 L2 (Daniel)
 | |
| Discovery | |
|---|---|
| Discovered by | Zaccheus Daniel |
| Discovery site | Princeton, New Jersey |
| Discovery date | 10 June 1907 |
| Designations | |
| 1907d[2] 1907 IV | |
| Orbital characteristics[3] | |
| Epoch | 27 September 1907 (JD 2417845.5) |
| Observation arc | 344 days |
| Number of observations | 173 |
| Aphelion | 830.60 AU |
| Perihelion | 0.512 AU |
| Semi-major axis | 415.55 AU |
| Eccentricity | 0.99877 |
| Orbital period | ~8,470 years (inbound) ~5,220 years (outbound) |
| Inclination | 8.958° |
| 144.27° | |
| Argument of periapsis | 294.47° |
| Last perihelion | 4 September 1907 |
| TJupiter | 0.889 |
| Earth MOID | 0.058 AU |
| Jupiter MOID | 0.417 AU |
| Physical characteristics[4] | |
| Comet total magnitude (M1) | 3.7 |
| Comet nuclear magnitude (M2) | 7.2 |
| 2.6 (1907 apparition) | |
Daniel's Comet, formally known as C/1907 L2, is a non-periodic comet that became visible in the naked eye in 1907. It was the first of three comets discovered by American astronomer, Zaccheus Daniel.
Discovery and observations
[edit]The comet was discovered by Zaccheus Daniel using a 15 cm (5.9 in) comet-seeker on the dawn of 10 June 1907, however its nature as a comet wasn't confirmed until two days later by William Robert Brooks.[4] At the time, the object was located within the constellation Pisces.[a]
The comet rapidly brightened as it slowly approached the Earth, and was closest at 0.757 AU (113.2 million km) on 2 August 1907.[4] Edward E. Barnard made a series of photographic observations of the comet between 11 July and 8 September 1907, where he described the comet being visible to the naked eye for two months.[5] At the same time, Edward C. Pickering also made several photographic observations between 12 July and 4 August 1907.[6] J. Charles Duncan noted that the comet had reached magnitude 3.0 on 24 July 1907.[7] Across the Atlantic, Max Wolf made extensive observations of the comet until 27 August.[1][8]
It was last observed from the Chamberlin Observatory in Denver, Colorado, on the early morning of 30 June 1908.[4]
References
[edit]Notes
[edit]Citations
[edit]- ^ a b M. Wolf (1908). "Photographien und Zeichnungen des Kometen 1907d (Daniel)" [Photographs and drawings of the Comet 1907d (Daniel)] (PDF). Abhandlungen der Bayerischen Akademie der Wissenschaften [Proceedings of the Bavarian Academy of Sciences] (in German). 23 (7): 439–443. doi:10.11588/diglit.19637.
- ^ "Comet Names and Designations". International Comet Quarterly. Retrieved 4 January 2025.
- ^ "C/1907 L2 (Daniel) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 24 November 2023.
- ^ a b c d e G. W. Kronk (2007). Cometography: A Catalog of Comets. Vol. 3: 1900–1932. Cambridge University Press. pp. 110–119. ISBN 978-0-521-58506-4.
- ^ E. E. Barnard (1910). "Photographic Observations of Daniel's Comet" (PDF). Proceedings of the American Philosophical Society. 49 (194): 3–16. Bibcode:1910PAPhS..49....3B. JSTOR 983986.
- ^ E. C. Pickering (1908). "Photographs of Daniel's Comet, (1907d)". Harvard College Observatory Circular. 144: 2–3. Bibcode:1908HarCi.144R...2P.
- ^ J. C. Duncan (1907). "Note on Comet d 1907 (Daniel)" (PDF). Publications of the Astronomical Society of the Pacific. 19 (115): 195–196. JSTOR 40692857.
- ^ M. Wolf (1908). "Photographs of Comet d, 1907 (Daniel): Plate 6" (PDF). Monthly Notices of the Royal Astronomical Society. 68 (3): 180–181. doi:10.1093/mnras/68.3.180.
External links
[edit]- C/1907 L2 at the JPL Small-Body Database
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