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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682826566601527 3.6712e-08  
a 1.908925499280043 4.83e-09 au
q 1.587686444894889 6.9503e-08 au
i 24.98115493062252 5.4589e-06 deg
node 179.8527717478889 9.101e-06 deg
peri 102.265325247903 1.7296e-05 deg
M 122.7921821920344 1.4405e-05 deg
tp 2458271.913200369711
(2018-Jun-02.41320037)
3.8458e-05 TDB
period 963.3451067911537
2.64
3.6562e-06
1.001e-08
d
yr
n .3736978549661595 1.4183e-09 deg/d
Q 2.230164553665197 5.6428e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      15181 days (41.56 yr)  
   first obs. used      1978-04-08  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45354  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:16:05  

Additional Information
 Earth MOID = .710759 au 
 Jupiter MOID = 3.06455 au 
 T_jup = 3.808 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456447.5 (2013-Jun-04.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1685926341712547 3.6713e-08  
q 1.586933034774064 6.9511e-08 au
tp 2456345.155573186329
(2013-Feb-21.65557319)
3.8664e-05 TDB
node 179.8959395354608 9.1038e-06 deg
peri 102.1479846998671 1.7264e-05 deg
i 24.97827233134934 5.4588e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      15181 days (41.56 yr)  
   first obs. used      1978-04-08  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45354  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:16:05  

Additional Information
 Jupiter MOID = 3.06455 au 
 T_jup = 3.808 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.347859854547385E-15 -2.547843990091976E-15 3.50154260076327E-13 2.396552724229949E-15 1.428174470919089E-13 -2.288893883267417E-15
q -2.547843990091976E-15 4.831796772125145E-15 -6.888774035998779E-13 -4.938734485630841E-15 -2.800314354455242E-13 4.618864134821072E-15
tp 3.50154260076327E-13 -6.888774035998779E-13 1.49492267189011E-9 6.255077454730513E-12 5.74893025454535E-10 -3.150759531099982E-12
node 2.396552724229949E-15 -4.938734485630841E-15 6.255077454730513E-12 8.287936686543192E-11 -7.201814940365092E-11 -8.39055838757819E-12
peri 1.428174470919089E-13 -2.800314354455242E-13 5.74893025454535E-10 -7.201814940365092E-11 2.980308109112576E-10 6.250027657143323E-12
i -2.288893883267417E-15 4.618864134821072E-15 -3.150759531099982E-12 -8.39055838757819E-12 6.250027657143323E-12 2.979816293113959E-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 14.26   n/a PDS3 (MPC 17265)  
rotation period rot_per 3.8492 h n/a LCDB (Rev. 2019-January); 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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