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JPL Small-Body Database Browser
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1194 Aletta (1931 JG)
Classification: Main-belt Asteroid          SPK-ID: 2001194
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09145779137449356 4.7738e-08  
a 2.913882566944066 1.4289e-08 au
q 2.647385303046721 1.3855e-07 au
i 10.86971827142782 4.6482e-06 deg
node 291.2920297388149 2.6456e-05 deg
peri 243.3689191281409 3.6381e-05 deg
M 297.0534720385081 2.6644e-05 deg
tp 2458918.169686136807
(2020-Mar-09.66968614)
0.00013517 TDB
period 1816.797378867534
4.97
1.3363e-05
3.659e-08
d
yr
n .1981508803278873 1.4575e-09 deg/d
Q 3.18037983084141 1.5595e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2071  
   data-arc span      32343 days (88.55 yr)  
   first obs. used      1931-05-20  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40454  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:55:29  

Additional Information
 Earth MOID = 1.67565 au 
 Jupiter MOID = 1.93334 au 
 T_jup = 3.249 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.7   n/a MPO435707  
diameter diameter 41.358 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 20.39 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Brinsfield, J.W. (2008) Minor Planet Bull. 35, 86-87.]
[Oey, J. (2011) Minor Planet Bull. 38, 221-223.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.087   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1194 Aletta (1931 JG)          Discovered 1931-May-13 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1931 JG = 1946 KC = 1962 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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