1064 Aethusa, provisional designation 1926 PA, is a stony background asteroid from the central regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 2 August 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[14] The asteroid was named after the plant Aethusa cynapium (fool's parsley).[3]
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 2 August 1926 |
| Designations | |
| (1064) Aethusa | |
| Pronunciation | /iːˈθjuːsə/[2] |
Named after | Aethusa cynapium (fool's parsley)[3] |
| 1926 PA · 1962 HF | |
| main-belt · (middle) | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 90.66 yr (33,112 days) |
| Aphelion | 2.9930 AU |
| Perihelion | 2.0917 AU |
| 2.5424 AU | |
| Eccentricity | 0.1773 |
| 4.05 yr (1,481 days) | |
| 165.59° | |
| 0° 14m 35.16s / day | |
| Inclination | 9.5020° |
| 280.57° | |
| 20.515° | |
| Physical characteristics | |
| Dimensions | 17.42±3.60 km[4] 18.56 km (derived)[5] 18.66±0.9 km[6] 19.77±0.36 km[7] 20.007±0.173 km[8] 22.377±0.131 km[9] 25.361±4.376 km[10] |
| 8.621±0.004 h[11][a] 12.916±0.002 h[12] | |
| 0.160±0.087[10] 0.2282±0.0133[9] 0.27±0.12[4] 0.278±0.046[8] 0.288±0.012[7] 0.2952 (derived)[5] 0.3202±0.034[6] | |
| S[5] | |
| 10.50[6][7][9][10] · 10.6[1][5] · 10.75±0.20[13] · 10.88[4] | |
Orbit and classification
editAethusa is a background asteroid with no associated asteroid family. It orbits the Sun in the central main belt at a distance of 2.1–3.0 AU once every 4 years and 1 month (1,481 days). Its orbit has an eccentricity of 0.18 and an inclination of 10° with respect to the ecliptic.[1] The observation arc begins at Heidelberg/Simeiz Observatory two nights after the asteroid's official discovery observation.[14]
Physical characteristics
editAethusa is an assumed stony S-type asteroid, the most common type in the inner part of the central asteroid belt.
Rotation period
editIn November 2004, a rotational lightcurve of Aethusa was obtained from photometric observations by French amateur astronomer René Roy at Blauvac Observatory (627). Lightcurve analysis gave a rotation period of 12.916 hours with a brightness variation of 0.12 magnitude (U=2), while in March 2006, astronomer Brian Warner at his Palmer Divide observatory in Colorado, United States, obtained a shorter period of 8.621 hours and an amplitude of 0.18 magnitude (U=2).[11][12][a]
Diameter and albedo
editAccording to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, the MIPS photometer on the Spitzer Space Telescope, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Aethusa measures between 17.42 and 25.361 kilometers in diameter and its surface has an albedo between 0.160 and 0.3202.[4][6][7][8][9][10]
The Collaborative Asteroid Lightcurve Link derives a high albedo of 0.2952 and a diameter of 18.56 kilometers based on an absolute magnitude of 10.6.[5]
Naming
editThis minor planet was named after the genus "Aethusa" in the carrot family, of which the plant Aethusa cynapium – commonly known as fool's parsley, fool's cicely, or poison parsley – is the only member. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 101).[3]
See also
editNotes
edit- ^ a b Lightcurve plot of 1064 Aethusa, Palmer Divide Observatory, Brian D. Warner (2006)
References
edit- ^ a b c d "JPL Small-Body Database Browser: 1064 Aethusa (1926 PA)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 30 August 2017.
- ^ John Walker (1808) A Key to the Classical Pronunciation of Greek, Latin, and Scripture Proper Names
- ^ a b c Schmadel, Lutz D. (2007). "(1064) Aethusa". Dictionary of Minor Planet Names – (1064) Aethusa. Springer Berlin Heidelberg. p. 91. doi:10.1007/978-3-540-29925-7_1065. ISBN 978-3-540-00238-3.
- ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
- ^ a b c d e "LCDB Data for (1064) Aethusa". Asteroid Lightcurve Database (LCDB). Retrieved 30 August 2017.
- ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
- ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
- ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. S2CID 119293330. Retrieved 30 August 2017.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID 35447010.
- ^ a b c d Ryan, E. L.; Mizuno, D. R.; Shenoy, S. S.; Woodward, C. E.; Carey, S. J.; Noriega-Crespo, A.; et al. (June 2015). "The kilometer-sized Main Belt asteroid population revealed by Spitzer". Astronomy and Astrophysics. 578: 12. arXiv:1204.1116. Bibcode:2015A&A...578A..42R. doi:10.1051/0004-6361/201321375. Retrieved 30 August 2017.
- ^ a b Warner, Brian D. (December 2006). "Asteroid lightcurve analysis at the Palmer Divide Observatory - March - June 2006". The Minor Planet Bulletin. 33 (4): 85–88. Bibcode:2006MPBu...33...85W. ISSN 1052-8091. Retrieved 30 August 2017.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1064) Aethusa". Geneva Observatory. Retrieved 30 August 2017.
- ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved 30 August 2017.
- ^ a b "1064 Aethusa (1926 PA)". Minor Planet Center. Retrieved 30 August 2017.
External links
edit- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1064 Aethusa at AstDyS-2, Asteroids—Dynamic Site
- 1064 Aethusa at the JPL Small-Body Database
