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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1224963649423109 1.0562e-08  
a 2.646397165934852 8.4378e-09 au
q 2.322223132914199 3.1116e-08 au
i 14.13776588834154 8.3435e-07 deg
node 49.52208517003993 3.0579e-06 deg
peri 184.1605490363456 1.0009e-05 deg
M 328.3610106564004 1.182e-05 deg
tp 2459534.697778685306
(2021-Nov-16.19777869)
5.1841e-05 TDB
period 1572.464903553393
4.31
7.5205e-06
2.059e-08
d
yr
n .2289399268540026 1.0949e-09 deg/d
Q 2.970571198955505 9.4714e-09 au
  Orbit Determination Parameters
   # obs. used (total)      5330  
   data-arc span      32938 days (90.18 yr)  
   first obs. used      1931-04-24  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .31014  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:04:44  

Additional Information
 Earth MOID = 1.31203 au 
 Jupiter MOID = 2.02 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 11.93   n/a E2021B10  
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. 2020-October); 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.]
[McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.]
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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