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43784 (1989 XR1)
Classification: Main-belt Asteroid          SPK-ID: 2043784
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2131488708894357 4.293e-08  
a 2.738948668385193 1.4863e-08 au
q 2.155144852294765 1.1787e-07 au
i 8.129066637412366 3.8244e-06 deg
node 112.7127913507898 3.3721e-05 deg
peri 267.4656844349 3.4581e-05 deg
M 327.0439173431325 1.0406e-05 deg
tp 2459352.067940381423
(2021-May-17.56794038)
4.8472e-05 TDB
period 1655.671855949239
4.53
1.3477e-05
3.69e-08
d
yr
n .2174343899767522 1.7699e-09 deg/d
Q 3.322752484475621 1.8031e-08 au
  Orbit Determination Parameters
   # obs. used (total)      880  
   data-arc span      11332 days (31.03 yr)  
   first obs. used      1989-11-06  
   last obs. used      2020-11-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53274  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:22:22  

Additional Information
 Earth MOID = 1.17476 au 
 Jupiter MOID = 2.1978 au 
 T_jup = 3.303 
[ 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 14.78   n/a E2021B10  
diameter diameter 6.192 km 0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43784 (1989 XR1)          Discovered 1989-Dec-02 by Elst, E. W. at La Silla
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1989 XR1 = 2000 DR86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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