Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
4167 Riemann (1978 TQ7)
Classification: Main-belt Asteroid          SPK-ID: 2004167
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0921830305569261 1.139e-08  
a 2.582999146873814 9.1617e-09 au
q 2.344890457589031 2.9005e-08 au
i 14.99394918779288 4.9093e-07 deg
node 160.5089763256723 2.2306e-06 deg
peri 114.131157968554 1.0926e-05 deg
M 164.9065993694261 1.0491e-05 deg
tp 2458505.923067129216
(2019-Jan-22.42306713)
4.2802e-05 TDB
period 1516.298903680149
4.15
8.0673e-06
2.209e-08
d
yr
n .2374202072732877 1.2632e-09 deg/d
Q 2.821107836158597 1.0006e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3131  
   data-arc span      19367 days (53.02 yr)  
   first obs. used      1968-02-27  
   last obs. used      2021-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3806  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:11:13  

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 | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.0   n/a MPO448955  
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

[ show close-approach data ]
Alternate Designations
 1978 TQ7 = 1968 DR = 1986 TO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-11 17:00 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin