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4167 Riemann (1978 TQ7)
Classification: Main-belt Asteroid          SPK-ID: 2004167
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 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09202682667045298 1.1346e-08  
a 2.583346591546094 9.1693e-09 au
q 2.345609402536176 2.8914e-08 au
i 14.99454848228942 4.9078e-07 deg
node 160.5047942834371 2.2299e-06 deg
peri 114.1751260280165 1.0922e-05 deg
M 211.3860091038595 1.0604e-05 deg
tp 2460022.579722465266
(2023-Mar-19.07972247)
4.6212e-05 TDB
period 1516.604854821574
4.15
8.0745e-06
2.211e-08
d
yr
n .2373723114860748 1.2638e-09 deg/d
Q 2.821083780556012 1.0013e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3189  
   data-arc span      19424 days (53.18 yr)  
   first obs. used      1968-02-27  
   last obs. used      2021-05-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:17:05  

Additional Information
 Earth MOID = 1.37155 au 
 Jupiter MOID = 2.38208 au 
 T_jup = 3.370 
[ 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 11.95   n/a MPO636126  
diameter diameter 12.916 km 0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 4.060 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Zhao, A.; Aggarwal, A.; Odden, C. (2014) Minor Planet Bull. 41, 203.]
geometric albedo albedo 0.202   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4167 Riemann (1978 TQ7)          Discovered 1978-Oct-02 by Zhuravleva, L. V. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1978 TQ7 = 1968 DR = 1986 TO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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