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2449 Kenos (1978 GC)
Classification: Mars-crossing Asteroid          SPK-ID: 2002449
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1683658676621748 3.5649e-08  
a 1.908754256071118 4.3867e-09 au
q 1.587385189593835 6.7841e-08 au
i 24.98288297519919 5.1321e-06 deg
node 179.8425029824498 8.3014e-06 deg
peri 102.3289662253807 1.5551e-05 deg
M 272.2103698296991 1.3849e-05 deg
tp 2459235.389808184271
(2021-Jan-20.88980818)
3.7284e-05 TDB
period 963.2154820825776
2.64
3.3205e-06
9.091e-09
d
yr
n .3737481453492011 1.2884e-09 deg/d
Q 2.230123322548401 5.1253e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1929  
   data-arc span      15411 days (42.19 yr)  
   first obs. used      1978-04-08  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43551  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:09:16  

Additional Information
 Earth MOID = .711108 au 
 Jupiter MOID = 3.06425 au 
 T_jup = 3.808 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457059.5 (2015-Feb-06.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682409729925565 3.5637e-08  
q 1.587759308432679 6.7793e-08 au
tp 2457308.789710910918
(2015-Oct-13.28971091)
3.5959e-05 TDB
node 179.8623206467251 8.3e-06 deg
peri 102.284326713287 1.5564e-05 deg
i 24.98436126689557 5.1325e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1929  
   data-arc span      15411 days (42.19 yr)  
   first obs. used      1978-04-08  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43551  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:09:16  

Additional Information
 Jupiter MOID = 3.06425 au 
 T_jup = 3.808 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.269990380410729E-15 -2.412452893784395E-15 4.785936328576546E-13 2.133153068294365E-15 1.973855741464224E-13 -7.175723979665764E-16
q -2.412452893784395E-15 4.595841203516692E-15 -8.9761311943491E-13 -4.352303306148837E-15 -3.730528209370055E-13 1.438256153494968E-15
tp 4.785936328576546E-13 -8.9761311943491E-13 1.293038034992155E-9 2.912712678572051E-12 4.79631576965542E-10 -1.053419847590573E-12
node 2.133153068294365E-15 -4.352303306148837E-15 2.912712678572051E-12 6.889039529718771E-11 -6.071270300092183E-11 -1.329988211672729E-11
peri 1.973855741464224E-13 -3.730528209370055E-13 4.79631576965542E-10 -6.071270300092183E-11 2.42249034443319E-10 1.157488781289275E-11
i -7.175723979665764E-16 1.438256153494968E-15 -1.053419847590573E-12 -1.329988211672729E-11 1.157488781289275E-11 2.634289309235002E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.14   n/a E2021B10  
rotation period rot_per 3.8492 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2007) Minor Planet Bull. 34, 72-77.]
[Warner, B.D. (2010) Minor Planet Bull. 37, 161-165.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 183-186.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 380-386.]
B-V BV 0.684   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=31.04, mean=31.63, max.=32.22) deg.
U-B UB 0.356   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=32.22 deg.
Tholen spectral type spec_T E   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

2449 Kenos (1978 GC)          Discovered 1978-Apr-08 by Liller, W. at Cerro Tololo
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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