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21797 (1999 SW11)
Classification: Main-belt Asteroid          SPK-ID: 2021797
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09137982708147262 2.9997e-08  
a 2.349875904609465 6.8536e-09 au
q 2.135144650783333 7.1908e-08 au
i 6.884136224626145 3.1603e-06 deg
node 62.26414989444884 2.6942e-05 deg
peri 338.7121799024528 3.2174e-05 deg
M 359.4249561408072 1.7604e-05 deg
tp 2459398.601668854343
(2021-Jul-03.10166885)
6.4341e-05 TDB
period 1315.727097104372
3.60
5.7561e-06
1.576e-08
d
yr
n .2736129709514089 1.197e-09 deg/d
Q 2.564607158435597 7.4799e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2056  
   data-arc span      14524 days (39.76 yr)  
   first obs. used      1981-10-24  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46821  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:59  

Additional Information
 Earth MOID = 1.14486 au 
 Jupiter MOID = 2.7646 au 
 T_jup = 3.543 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457106.5 (2015-Mar-25.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09220028348827841 3.0015e-08  
q 2.1342865949125 7.2045e-08 au
tp 2456767.276688480774
(2014-Apr-19.77668848)
6.1728e-05 TDB
node 62.35036046671215 2.6912e-05 deg
peri 338.9334402461237 3.2041e-05 deg
i 6.88769285850401 3.1615e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2056  
   data-arc span      14524 days (39.76 yr)  
   first obs. used      1981-10-24  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46821  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:59  

Additional Information
 Jupiter MOID = 2.7646 au 
 T_jup = 3.543 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.00917934119822E-16 -2.154621006385059E-15 -2.60575247691599E-13 -7.559742278933991E-15 -6.523910922823461E-14 -4.864049885035591E-16
q -2.154621006385059E-15 5.190451726254769E-15 6.361666796093314E-13 1.808645886245351E-14 1.617921889694214E-13 1.171855703952252E-15
tp -2.60575247691599E-13 6.361666796093314E-13 3.810398569416005E-9 -3.315741213203265E-12 1.083679122579251E-9 2.778454013329845E-13
node -7.559742278933991E-15 1.808645886245351E-14 -3.315741213203265E-12 7.242400240248207E-10 -7.195665731932609E-10 -1.439492286823708E-11
peri -6.523910922823461E-14 1.617921889694214E-13 1.083679122579251E-9 -7.195665731932609E-10 1.026633854393553E-9 1.43610681640942E-11
i -4.864049885035591E-16 1.171855703952252E-15 2.778454013329845E-13 -1.439492286823708E-11 1.43610681640942E-11 9.995051224514492E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.33   n/a E2021B10  

21797 (1999 SW11)          Discovered 1999-Sep-30 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 SW11 = 1981 US17 = 1990 DF7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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