C/1913 Y1 (Delavan)

C/1913 Y1 (Delavan)

Comet Delavan photographed by Gavril A. Tikhov from the Pulkovo Observatory in October 1914
Discovery
Discovered by	Pablo T. Delavan
Discovery site	La Plata Observatory
Discovery date	18 December 1913
Designations
Alternative designations	1914 V, 1913f [1]
Orbital characteristics [2]
Epoch	15 March 1914 (JD 2420206.5)
Observation arc	628 days (1.72 years) [3]
Number of observations	1,006
Perihelion	1.1044 AU
Eccentricity	1.00014
Inclination	68.043°
Longitude of ascending node	60.397°
Argument of periapsis	287.436°
Last perihelion	26 October 1914
Earth MOID	0.63832 AU
Jupiter MOID	1.64685 AU
Physical characteristics [4] [5]
Mean radius	1.89 km (1.17 mi) [a]
Comet total magnitude (M1)	4.8
Apparent magnitude	1.1 (1914 apparition)

Comet Delavan, formally designated as C/1913 Y1, is a non-periodic comet discovered by astronomer Pablo T. Delavan on from the La Plata Observatory in Argentina on 18 December 1913. ^[3]

The comet was last seen on 19 September 1915. ^[6] It is one of 19 comets used in the original sample by Jan Oort for his hypothesis regarding the origin of long-period comets in 1950. ^[7]

References

Notes

1. Calculated mean radius using the formula: ${\displaystyle \log _{10}\,(\,R\,)\ =\;0.9+\;0.13(\,H\,)}$ ^[4]
   Where ${\displaystyle \,H\,}$ is the comet's absolute total magnitude (M1)

Citations

1. "Comet Names and Designations". International Comet Quarterly. Retrieved 4 November 2024.
2. "C/1913 Y1 – JPL Small-Body Database Browser". ssd.jpl.nasa.gov. Jet Propulsion Laboratory . Retrieved 4 November 2024.
3. "C/1913 Y1 | CODEC". Catalogue of Cometary Orbits and their Dynamical Evolution. Retrieved 4 November 2024.
4. J. A. Fernández; A. Sosa (2012). "Magnitude and size distribution of long-period comets in Earth-crossing or approaching orbits" (PDF). Monthly Notices of the Royal Astronomical Society. 423 (2): 1674–1690. arXiv: 1204.2285 . Bibcode:2012MNRAS.423.1674F. doi: 10.1111/j.1365-2966.2012.20989.x .
5. M. Kidger (3 April 1997). "Comet Hale-Bopp Light Curve". jpl.nasa.gov. NASA / JPL. Archived from the original on 7 April 2023. Retrieved 17 November 2008.
6. G. W. Kronk (2007). Cometography: A Catalog of Comets. Vol. 3: 1900–1932. Cambridge University Press. pp. 275–286. ISBN   978-0-521-58506-4.
7. M. Królikowska; P. A. Dybczyński (2010). "Where do Long-Period Comets come from? 26 Comets from the non-gravitational Oort spike" (PDF). Monthly Notices of the Royal Astronomical Society. 404 (4): 1886–1902. Bibcode:2010MNRAS.404.1886K. doi: 10.1111/j.1365-2966.2010.16403.x .

External links

• C/1913 Y1 at the JPL Small-Body Database
  • Close approach  · Discovery  · Ephemeris  · Orbit viewer  · Orbit parameters  · Physical parameters
• Comet of the Week: Delavan 1913f by Alan Hale at RocketSTEM