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21049 (1990 SU16)
Classification: Main-belt Asteroid          SPK-ID: 2021049
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1272997376653184 7.9735e-09  
a 2.472313633852356 8.0863e-09 au
q 2.157588756836561 2.3197e-08 au
i 6.214312004584734 6.2166e-07 deg
node 109.9267435150375 5.4406e-06 deg
peri 174.9299144997468 1.2828e-05 deg
M 324.0622565727694 1.5352e-05 deg
tp 2459342.243148575782
(2021-May-07.74314858)
6.0906e-05 TDB
period 1419.886966208825
3.89
6.9661e-06
1.907e-08
d
yr
n .2535413089685719 1.2439e-09 deg/d
Q 2.787038510868151 9.1157e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2571  
   data-arc span      10894 days (29.83 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45959  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:51:50  

Additional Information
 Earth MOID = 1.13931 au 
 Jupiter MOID = 2.35043 au 
 T_jup = 3.464 
[ 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 13.62   n/a E2021B10  
diameter diameter 5.387 km 0.426 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.242   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21049 (1990 SU16)          Discovered 1990-Sep-17 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 SU16 = 1999 XW15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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