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4888 Doreen (1981 JX1)
Classification: Main-belt Asteroid          SPK-ID: 2004888
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01650790721805817 1.6087e-08  
a 2.349689547451197 7.2058e-09 au
q 2.310901090410632 3.9086e-08 au
i 4.05521936968687 1.0002e-06 deg
node 33.27377658320956 1.1138e-05 deg
peri 215.6967162035883 5.3326e-05 deg
M 331.659131619924 5.9234e-05 deg
tp 2459304.067813269292
(2021-Mar-30.56781327)
0.00021657 TDB
period 1315.570584391709
3.60
6.0517e-06
1.657e-08
d
yr
n .2736455225368665 1.2588e-09 deg/d
Q 2.388478004491763 7.3248e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2241  
   data-arc span      14308 days (39.17 yr)  
   first obs. used      1981-04-11  
   last obs. used      2020-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46728  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:54:33  

Additional Information
 Earth MOID = 1.29683 au 
 Jupiter MOID = 2.58065 au 
 T_jup = 3.555 
[ 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 13.85   n/a E2021B10  
diameter diameter 4.260 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.294   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4888 Doreen (1981 JX1)          Discovered 1981-May-05 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 JX1 = 1986 WP = 1988 GS2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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