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11512 (1991 AB2)
Classification: Main-belt Asteroid          SPK-ID: 2011512
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1238282602678038 2.6412e-08  
a 2.268009367584094 6.6389e-09 au
q 1.987165713325074 5.939e-08 au
i 4.033037230699191 3.0111e-06 deg
node 175.527535202525 5.5159e-05 deg
peri 333.202062605845 5.7454e-05 deg
M 73.52394681072846 1.6295e-05 deg
tp 2458345.704352896210
(2018-Aug-15.20435290)
5.6275e-05 TDB
period 1247.572211996375
3.42
5.4778e-06
1.5e-08
d
yr
n .288560450880775 1.267e-09 deg/d
Q 2.548853021843115 7.4609e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2136  
   data-arc span      10473 days (28.67 yr)  
   first obs. used      1990-12-21  
   last obs. used      2019-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4704  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:09:50  

Additional Information
 Earth MOID = .999658 au 
 Jupiter MOID = 2.45004 au 
 T_jup = 3.601 
[ 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 13.7   n/a MPO337356  
diameter diameter 4.347 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.933 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:
[Hess, K.; Ditteon, R. (2016) Minor Planet Bull. 43, 87.]
geometric albedo albedo 0.372   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11512 (1991 AB2)          Discovered 1991-Jan-11 by Helin, E. F. at Palomar
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 AB2 = 1969 UO1 = 1996 TG51 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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