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79104 (1981 EK33)
Classification: Main-belt Asteroid          SPK-ID: 2079104
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04035775843768606 5.0792e-08  
a 2.777047941613762 2.0845e-08 au
q 2.664972511616241 1.3636e-07 au
i 5.131057102276192 4.6832e-06 deg
node 292.2255264529711 7.5627e-05 deg
peri 355.8097378381403 0.00011534 deg
M 60.53854786579431 8.8071e-05 deg
tp 2458716.248351944451
(2019-Aug-20.74835194)
0.00041313 TDB
period 1690.337758461775
4.63
1.9032e-05
5.211e-08
d
yr
n .2129751868807591 2.398e-09 deg/d
Q 2.889123371611283 2.1687e-08 au
  Orbit Determination Parameters
   # obs. used (total)      474  
   data-arc span      14503 days (39.71 yr)  
   first obs. used      1981-03-01  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54279  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:07:24  

Additional Information
 Earth MOID = 1.64865 au 
 Jupiter MOID = 2.19816 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457212.5 (2015-Jul-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04114977995441667 5.116e-08  
q 2.664123217644826 1.3779e-07 au
tp 2457038.551462402477
(2015-Jan-16.05146240)
0.0004015 TDB
node 292.3226120032009 7.5765e-05 deg
peri 358.7244676997759 0.00011392 deg
i 5.125073796101871 4.6792e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      474  
   data-arc span      14503 days (39.71 yr)  
   first obs. used      1981-03-01  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54279  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:07:24  

Additional Information
 Jupiter MOID = 2.19816 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.617362381617856E-15 -6.981612125469059E-15 5.845079812391657E-12 2.235617508422956E-14 1.086518089675138E-12 -1.690607669452699E-15
q -6.981612125469059E-15 1.898693608238607E-14 -1.593040618209262E-11 -5.306584876183724E-14 -2.971999995485671E-12 5.059934864150194E-15
tp 5.845079812391657E-12 -1.593040618209262E-11 1.612042884791635E-7 4.378225549524756E-11 3.421017280899501E-8 -4.412803950141902E-11
node 2.235617508422956E-14 -5.306584876183724E-14 4.378225549524756E-11 5.740353869899265E-9 -5.708962300580949E-9 1.155455602370653E-10
peri 1.086518089675138E-12 -2.971999995485671E-12 3.421017280899501E-8 -5.708962300580949E-9 1.297737809610206E-8 -1.244522531832511E-10
i -1.690607669452699E-15 5.059934864150194E-15 -4.412803950141902E-11 1.155455602370653E-10 -1.244522531832511E-10 2.189448589423196E-11

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 15.6   n/a MPO432340  

79104 (1981 EK33)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1907-Sep-15 19:20 00:15 Amphi 0.028215038019802 0.0281937325117064 0.0282363539188018 2.29645573637763 2.29645564765502 2417834.305616997 14.9276520465964 1362.01809618447 52.5076758475142 38.8511484435075 50404.7003128496 T 14 CATAB v2.0f-lin.ifort 2020-Dec-17 22:07:26 2020-Dec-17 22:07
2166-Sep-20 01:13 00:20 Iris 0.0454041094314602 0.0453658735101804 0.0454423453615952 3.53174913855708 3.53174910270718 2512437.550388344 19.9425554028669 1905.14946593851 70.1753337457797 -0.182471750897092 3575.94535787425 T 14 CATAB v2.0f-lin.ifort 2020-Dec-17 22:07:26 2020-Dec-17 22:07

Alternate Designations
 1981 EK33 = 2001 SA81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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