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JPL Small-Body Database Browser
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1187 Afra (1929 XC)
Classification: Main-belt Asteroid          SPK-ID: 2001187
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2225082077913731 3.329e-08  
a 2.639750478178221 8.3024e-09 au
q 2.052384330262365 8.8406e-08 au
i 10.69713746308591 4.1568e-06 deg
node 327.1713962114646 2.1051e-05 deg
peri 74.96548855132497 2.3109e-05 deg
M 320.1284939929864 8.9814e-06 deg
tp 2458774.001359394384
(2019-Oct-17.50135939)
3.9169e-05 TDB
period 1566.544523575081
4.29
7.3906e-06
2.023e-08
d
yr
n .2298051504967303 1.0842e-09 deg/d
Q 3.227116626094078 1.015e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2001  
   data-arc span      32863 days (89.97 yr)  
   first obs. used      1929-12-06  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43251  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:18:20  

Additional Information
 Earth MOID = 1.08979 au 
 Jupiter MOID = 2.33881 au 
 T_jup = 3.336 
[ 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 11.5   n/a MPO384757  
diameter diameter 32.348 km 0.299 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.0701 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Menke, J.; Cooney, W.; Gross, J.; Terrell, D. (2008) Minor Planet Bull. 35, 155-160.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.051   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1187 Afra (1929 XC)          Discovered 1929-Dec-06 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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