1093 Freda

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1093 Freda
Discovery [1]
Discovered by B. Jekhovsky
Discovery site Algiers Obs.
Discovery date 15 June 1925
MPC designation (1093) Freda
Named after
Fred Prévost
(French engineer)[2]
1925 LA · A898 VE
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 88.15 yr (32,198 days)
Aphelion 3.9776 AU
Perihelion 2.2809 AU
3.1293 AU
Eccentricity 0.2711
5.54 yr (2,022 days)
0° 10m 41.16s / day
Inclination 25.215°
Physical characteristics
Dimensions 88.01±27.85 km[4]
101.67±1.45 km[5]
116.73±2.9 km[6]
126.04±43.76 km[7]
10.73±0.05 h[8]
10.73±0.05 h[8]
19.67±0.01 h[9][a]
19.701±0.0148 h[10]
Tholen = C[1][3]
B–V = 0.679 [1]
U–B = 0.356 [1]
8.49±0.42[11] · 8.83[1][3][5][6][7] · 8.88[4] · 8.882±0.001 (R)[10]

1093 Freda, provisional designation 1925 LA, is a carbonaceous asteroid from the outer regions of the asteroid belt's background population, approximately 110 kilometers in diameter. It was discovered on 15 June 1925, by astronomer Benjamin Jekhowsky at the Algiers Observatory in Algeria, North Africa.[12] The asteroid was named after French engineer Fred Prévost.[2]

Orbit and classification[edit]

Freda is a non-family asteroid of the main belt's background population. It orbits the Sun in the outer main-belt at a distance of 2.3–4.0 AU once every 5 years and 6 months (2,022 days). Its orbit has an eccentricity of 0.27 and an inclination of 25° with respect to the ecliptic.[1]

In November 1998, the asteroid was first identified as A898 VE at the Boyden Station of the Harvard Observatory in Peru. The body's observation arc begins at Yerkes Observatory in February 1929, almost four years after its official discovery observation at Algiers.[12]

Physical characteristics[edit]

In the Tholen classification, Freda is a common carbonaceous C-type asteroid.[1][3]

Rotation period[edit]

Several rotational lightcurves of Freda were obtained from photometric observations by Brian Warner, Federico Manzini, and at the Palomar Transient Factory since 2007.[8][9][10] Best-rated lightcurve analysis gave a rotation period of 19.67 hours with a brightness amplitude of 0.21 magnitude (U=3).[9][a]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Freda measures between 88.01 and 126.04 kilometers in diameter and its surface has an albedo between 0.03 and 0.06.[4][5][6][7]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0381 and a diameter of 116.73 kilometers based on an absolute magnitude of 8.83.[3]


This minor planet was named after Fred Prévost, a French civil engineer of mines and benefactor of the Faculty of sciences of Bordeaux. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 103).[2]


  1. ^ a b Lightcurve plot of 1093 Freda, Palmer Divide Observatory, Brian D. Warner (2008). Summary figures for (1093) Freda at the LCDB


  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 1093 Freda (1925 LA)" (2017-03-30 last obs.). Jet Propulsion Laboratory. Retrieved 25 September 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1093) Freda. Springer Berlin Heidelberg. p. 93. ISBN 978-3-540-00238-3. Retrieved 25 September 2017. 
  3. ^ a b c d e "LCDB Data for (1093) Freda". Asteroid Lightcurve Database (LCDB). Retrieved 25 September 2017. 
  4. ^ 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:1606.08923Freely accessible. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 25 September 2017. 
  5. ^ 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 25 September 2017. 
  6. ^ 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. Bibcode:2004PDSS...12.....T. Retrieved 25 September 2017. 
  7. ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522Freely accessible. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 25 September 2017. 
  8. ^ a b c Behrend, Raoul. "Asteroids and comets rotation curves – (1093) Freda". Geneva Observatory. Retrieved 25 September 2017. 
  9. ^ a b c Warner, Brian D. (October 2008). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: February-May 2008". The Minor Planet Bulletin. 35 (4): 163–166. Bibcode:2008MPBu...35..163W. ISSN 1052-8091. Retrieved 25 September 2017. 
  10. ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 25 September 2017. 
  11. ^ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 25 September 2017. 
  12. ^ a b "1093 Freda (1925 LA)". Minor Planet Center. Retrieved 25 September 2017. 

External links[edit]