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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0921830308138048 1.1379e-08  
a 2.582999146486115 9.1561e-09 au
q 2.344890456573554 2.8986e-08 au
i 14.99394918796492 4.9087e-07 deg
node 160.5089762850585 2.2305e-06 deg
peri 114.13115765 1.0916e-05 deg
M 164.906599784438 1.0486e-05 deg
tp 2458505.923065537590
(2019-Jan-22.42306554)
4.2777e-05 TDB
period 1516.298903338762
4.15
8.0624e-06
2.207e-08
d
yr
n .2374202073267417 1.2624e-09 deg/d
Q 2.821107836398676 1e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3150  
   data-arc span      19384 days (53.07 yr)  
   first obs. used      1968-02-27  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37993  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:27:16  

Additional Information
 Earth MOID = 1.36941 au 
 Jupiter MOID = 2.38322 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 11.96   n/a MPCxxxxx  
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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