10988 Feinstein

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10988 Feinstein
Discovery [1]
Discovered by Félix Aguilar Obs.
Discovery site Félix Aguilar Obs.
Discovery date 28 July 1968
MPC designation (10988) Feinstein
Named after
Alejandro Feinstein
(Argentine astronomer)[2]
1968 OL · 1992 NH
main-belt · Phocaea[3]
background [4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 48.27 yr (17,630 days)
Aphelion 2.8707 AU
Perihelion 1.6887 AU
2.2797 AU
Eccentricity 0.2592
3.44 yr (1,257 days)
0° 17m 10.68s / day
Inclination 24.043°
Physical characteristics
Dimensions 3.43 km (calculated)[3]
2.6723±0.0005 h[a]
0.23 (assumed)[3]
14.09±0.16[a] · 14.3[1] · 14.54[3] · 14.65±0.23[5]

10988 Feinstein, provisional designation 1968 OL, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 3.4 kilometers in diameter. It was discovered on 28 July 1968, by astronomers at the Félix Aguilar Observatory in El Leoncito, Argentina. The asteroid was named after Argentine astronomer Alejandro Feinstein in 2008.[2]

Orbit and classification[edit]

Dynamically, Feinstein is a member of the Phocaea family (701),[3] a large inner-belt asteroid family of stony composition. However, no membership to any known family could be found when using the Hierarchical Clustering Method.[4]

Feinstein orbits the Sun in the inner main-belt at a distance of 1.7–2.9 AU once every 3 years and 5 months (1,257 days). Its orbit has an eccentricity of 0.26 and an inclination of 24° with respect to the ecliptic.[1] The body's observation arc begins at El Leoncito with its official discovery observation in 1968.[2]

Physical characteristics[edit]

Feinstein has been characterized as a common stony S-type asteroid by PanSTARRS photometric survey,[5] which agrees with the family's overall spectral type.[6]:23

Rotation period[edit]

In May 2016, a rotational lightcurve of Feinstein was obtained from photometric observations by Czech astronomer Petr Pravec at Ondřejov Observatory. Lightcurve analysis gave a short rotation period of 2.6723 hours with a brightness amplitude of 0.11 magnitude (U=3-).[a]

Diameter and albedo[edit]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.23 – derived from 25 Phocaea, the Phocaea family's largest member and namesake – and calculates a mean-diameter of 3.43 kilometers based on an absolute magnitude of 14.54.[3]


This minor planet was named after Argentinian astronomer Alejandro Feinstein (born 1928) at La Plata Astronomical Observatory in La Plata, and one of the co-founders of the Argentinian Astronomical Association (Spanish: Asociación Argentina de Astronomía).[2] The official naming citation was published by the Minor Planet Center on 20 May 2008 (M.P.C. 62929).[7]


  1. ^ a b c Pravec (2016) web: lightcurve plot of (10988) Feinstein. Rotation period 2.6723±0.0005 hours with a brightness amplitude of 0.11±0.01 mag. Quality Code: 3-. Source data from the Ondrejov Asteroid Photometry Project. Summary figures at Collaborative Asteroid Lightcurve Link (CALL)


  1. ^ a b c d "JPL Small-Body Database Browser: 10988 Feinstein (1968 OL)" (2016-11-03 last obs.). Jet Propulsion Laboratory. Retrieved 12 September 2017. 
  2. ^ a b c d "10988 Feinstein (1968 OL)". Minor Planet Center. Retrieved 12 September 2017. 
  3. ^ a b c d e f g "LCDB Data for (10988) Feinstein". Asteroid Lightcurve Database (LCDB). Retrieved 12 September 2017. 
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 12 September 2017. 
  5. ^ a b c 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 12 September 2017. 
  6. ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families" (PDF). Asteroids IV: 297–321. arXiv:1502.01628Freely accessible. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. Retrieved 12 September 2017. 
  7. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 12 September 2017. 

External links[edit]