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JPL Small-Body Database Browser
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74385 (1998 XH21)
Classification: Main-belt Asteroid          SPK-ID: 2074385
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09931958735800545 4.0546e-08  
a 3.013196073082511 2.4836e-08 au
q 2.713926682475194 1.2737e-07 au
i 1.650985610346292 5.2513e-06 deg
node 129.7345777713721 0.00016013 deg
peri 330.1596719224679 0.00016265 deg
M 328.1315379142575 2.8691e-05 deg
tp 2458769.621227049355
(2019-Oct-13.12122705)
0.00015297 TDB
period 1910.466892753076
5.23
2.362e-05
6.467e-08
d
yr
n .1884356129727129 2.3297e-09 deg/d
Q 3.312465463689828 2.7302e-08 au
  Orbit Determination Parameters
   # obs. used (total)      697  
   data-arc span      7648 days (20.94 yr)  
   first obs. used      1998-11-15  
   last obs. used      2019-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59455  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 08:52:14  

Additional Information
 Earth MOID = 1.73109 au 
 Jupiter MOID = 1.81705 au 
 T_jup = 3.241 
[ 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 14.9   n/a MPO417339  
diameter diameter 5.798 km 0.257 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74385 (1998 XH21)          Discovered 1998-Dec-10 by Spacewatch at Kitt Peak
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 XH21 = 2000 GW59 = 2002 RY188 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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