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JPL Small-Body Database Browser
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1193 Africa (1931 HB)
Classification: Main-belt Asteroid          SPK-ID: 2001193
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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 .1230071038383641 4.7923e-08  
a 2.646354484544347 9.9903e-09 au
q 2.320834083670881 1.2688e-07 au
i 14.14049564505657 5.5349e-06 deg
node 49.53925177660737 1.6781e-05 deg
peri 184.0023375387941 2.4175e-05 deg
M 146.3426808124521 1.8295e-05 deg
tp 2457961.296771053054
(2017-Jul-26.79677105)
7.9296e-05 TDB
period 1572.426862371108
4.31
8.9042e-06
2.438e-08
d
yr
n .2289454655189149 1.2964e-09 deg/d
Q 2.971874885417814 1.1219e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3315  
   data-arc span      32360 days (88.60 yr)  
   first obs. used      1931-04-24  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37789  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:18:38  

Additional Information
 Earth MOID = 1.31022 au 
 Jupiter MOID = 2.02128 au 
 T_jup = 3.339 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO452175  
diameter diameter 12.220 km 0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 158.7 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:
[Benishek, V. (2018) Minor Planet Bull. 45, 82-91.]
geometric albedo albedo 0.247   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1193 Africa (1931 HB)          Discovered 1931-Apr-24 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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