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2171 Kiev (1973 QD1)
Classification: Main-belt Asteroid          SPK-ID: 2002171
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1668621844914742 8.4447e-09  
a 2.255748258140047 5.7013e-09 au
q 1.879349176123961 2.1463e-08 au
i 7.516284253047953 4.991e-07 deg
node 102.0513586184566 3.2217e-06 deg
peri 180.1829737817143 5.2469e-06 deg
M 28.00238066272543 5.6734e-06 deg
tp 2459104.244217876061
(2020-Sep-11.74421788)
1.9473e-05 TDB
period 1237.469127428307
3.39
4.6914e-06
1.284e-08
d
yr
n .2909163485542041 1.1029e-09 deg/d
Q 2.632147340156133 6.6526e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3090  
   data-arc span      26075 days (71.39 yr)  
   first obs. used      1949-06-21  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43074  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:25:44  

Additional Information
 Earth MOID = .860976 au 
 Jupiter MOID = 2.50587 au 
 T_jup = 3.594 
[ 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 12.73   n/a E2021B10  
diameter diameter 8.035 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.1716 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Loera-González, P.; Olguín, L.; Saucedo-Morales, J.; Nuñez-López, R. (2020) Minor Planet Bull. 47, 348-349.]
[Polakis, T. (2020) Minor Planet Bull. 47, 314-321.]
[Romeuf, D.; Augustin, D.; Behrend, R.; Benishek, V.; et al. (2020) CBET 4794.]
geometric albedo albedo 0.108   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2171 Kiev (1973 QD1)          Discovered 1973-Aug-28 by Smirnova, T. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1973 QD1 = 1949 MN = 1949 MQ = 1956 RP = 1969 FK = 1970 XB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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