1589 Fanatica

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1589 Fanatica
Discovery [1]
Discovered byM. Itzigsohn
Discovery siteLa Plata Obs.
Discovery date13 September 1950
MPC designation(1589) Fanatica
Named after
Eva Perón
(Argentine idol)[2]
1950 RK · 1935 RD
1937 CF · 1946 OE
1950 TM3 · A924 WC
main-belt · Vestian[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc92.30 yr (33,713 days)
Aphelion2.6415 AU
Perihelion2.1918 AU
2.4167 AU
3.76 yr (1,372 days)
0° 15m 44.28s / day
Physical characteristics
Dimensions9.31±0.40 km[4]
10.698±0.125 km[5]
11.446±0.086 km[6]
12.16±0.76 km[7]
12.39 km (calculated)[3]
2.58±0.05 h[8]
2.582±0.001 h[9]
0.20 (assumed)[3]
11.8[4][6] · 11.9[1][3] · 12.00[7]

1589 Fanatica, provisional designation 1950 RK, is a stony, Vestian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 13 September 1950, by Argentine astronomer Miguel Itzigsohn at La Plata Astronomical Observatory in La Plata, Argentina.[10] It was named after Eva Perón.[2]

Orbit and classification[edit]

Based on its orbital elements, Fanatica is a S-type member of the Vesta family, which is named after 4 Vesta, the third largest body in the main-belt after the dwarf planet 1 Ceres and the minor planet 2 Pallas. Fanatica orbits the Sun at a distance of 2.2–2.6 AU once every 3 years and 9 months (1,372 days). Its orbit has an eccentricity of 0.09 and an inclination of 5° with respect to the ecliptic.[1] It was first identified as A924 WC at Heidelberg Observatory in 1924, extending the body's observation arc by 26 years prior to its official discovery observation at La Plata.[10]

Physical characteristics[edit]

Rotation period[edit]

In November 2003, a rotational lightcurve of Fanatica was obtained by astronomer Brian Warner at his Palmer Divide Observatory in Colorado. The light-curve analysis gave a rotation period of 2.58 hours with a brightness variation of 0.16 magnitude (U=3).[8] In August 2014, photometric observations by astronomer Robert Stephens gave a period of 2.582 hours and change in brightness of 0.18 magnitude (U=3).[9]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Fanatica measures between 9.31 and 12.16 kilometers in diameter, and its surface has an albedo between 0.189 and 0.388.[4][5][6][7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 12.39 kilometers, using an absolute magnitude of 11.9.[3]


This minor planet was named in reference to Argentine legend, Eva Perón (1919–1952), also known as "Evita", wife of Argentine President Juan Perón, First Lady of Argentina and idolized by millions.[2] The asteroids 1569 Evita, 1581 Abanderada, 1582 Martir and 1588 Descamisada were also discovered by Itzigsohn, and were also given names in tribute to Perón. The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 1069).[11]


  1. ^ a b c d "JPL Small-Body Database Browser: 1589 Fanatica (1950 RK)" (2017-03-15 last obs.). Jet Propulsion Laboratory. Retrieved 5 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1589) Fanatica". Dictionary of Minor Planet Names – (1589) Fanatica. Springer Berlin Heidelberg. p. 126. doi:10.1007/978-3-540-29925-7_1590. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (1589) Fanatica". Asteroid Lightcurve Database (LCDB). Retrieved 29 December 2016.
  4. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 29 December 2016.
  5. ^ 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. Retrieved 29 December 2016.
  6. ^ 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.
  7. ^ 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. Retrieved 29 December 2016.
  8. ^ a b Warner, Brian D. (June 2004). "Lightcurve analysis for numbered asteroids 1351, 1589, 2778, 5076, 5892, and 6386". The Minor Planet Bulletin. 31 (2): 36–39. Bibcode:2004MPBu...31...36W. ISSN 1052-8091. Retrieved 29 December 2016.
  9. ^ a b Stephens, Robert D. (January 2015). "Asteroids Observed from CS3: 2014 July - September". The Minor Planet Bulletin. 42 (1): 70–74. Bibcode:2015MPBu...42...70S. ISSN 1052-8091. Retrieved 29 December 2016.
  10. ^ a b "1589 Fanatica (1950 RK)". Minor Planet Center. Retrieved 29 December 2016.
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 December 2016.

External links[edit]