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433953 (1997 XR2)
Classification: Apollo [NEO, PHA]          SPK-ID: 2433953
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .20086632240949 3.2419e-08  
a 1.076194174196279 8.731e-10 au
q .8600230082269547 3.5428e-08 au
i 7.192041993018933 1.8959e-06 deg
node 250.6872572078419 6.6747e-06 deg
peri 84.58981576857761 8.1315e-06 deg
M 119.0048717296642 9.5284e-07 deg
tp 2458865.697911202002
(2020-Jan-17.19791120)
1.1227e-06 TDB
period 407.7879439887045
1.12
4.9625e-07
1.359e-09
d
yr
n .8828117782951714 1.0743e-09 deg/d
Q 1.292365340165604 1.0485e-09 au
  Orbit Determination Parameters
   # obs. used (total)      421  
   # delay obs. used      6  
   # Doppler obs. used      2  
   data-arc span      7014 days (19.20 yr)  
   first obs. used      1997-12-04  
   last obs. used      2017-02-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47134  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:18:45  

Additional Information
 Earth MOID = .000283567 au 
 Jupiter MOID = 3.99403 au 
 T_jup = 5.719 
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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 20.7   n/a MPO419177  
diameter diameter 0.259 km 0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 9.3205 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.115   0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

433953 (1997 XR2)          Discovered 1997-Dec-04 by LINEAR at Socorro
Reference: Last Updated: 2015-06-04

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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