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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1683658671532202 3.5823e-08  
a 1.908754255990616 4.4119e-09 au
q 1.587385190498356 6.8137e-08 au
i 24.98288318592319 5.1346e-06 deg
node 179.8425032479184 8.398e-06 deg
peri 102.3289661552165 1.5592e-05 deg
M 272.2103697544661 1.3857e-05 deg
tp 2459235.389808370705
(2021-Jan-20.88980837)
3.7305e-05 TDB
period 963.2154820216421
2.64
3.3395e-06
9.143e-09
d
yr
n .3737481453728454 1.2958e-09 deg/d
Q 2.230123321482876 5.1547e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1830  
   data-arc span      15360 days (42.05 yr)  
   first obs. used      1978-04-08  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:40:09  

Additional Information
 Earth MOID = .711108 au 
 Jupiter MOID = 3.06425 au 
 T_jup = 3.808 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456986.5 (2014-Nov-25.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682372113352704 3.5804e-08  
q 1.587898800903467 6.808e-08 au
tp 2457308.729959555563
(2015-Oct-13.22995956)
3.5997e-05 TDB
node 179.8646087688229 8.3974e-06 deg
peri 102.2513529780248 1.5606e-05 deg
i 24.98208687339362 5.1348e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1830  
   data-arc span      15360 days (42.05 yr)  
   first obs. used      1978-04-08  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:40:09  

Additional Information
 Jupiter MOID = 3.06425 au 
 T_jup = 3.808 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.281927467390321E-15 -2.434025885992184E-15 4.761301844553375E-13 3.255271099799005E-15 1.942431588660149E-13 -7.843248764871438E-16
q -2.434025885992184E-15 4.634861758171911E-15 -8.931163141178428E-13 -6.445236475642476E-15 -3.672978966239302E-13 1.493868811320146E-15
tp 4.761301844553375E-13 -8.931163141178428E-13 1.295792019281437E-9 4.086840177621961E-12 4.798744627726343E-10 -1.130247186207626E-12
node 3.255271099799005E-15 -6.445236475642476E-15 4.086840177621961E-12 7.051715508623518E-11 -6.17740889391802E-11 -1.340292475879593E-11
peri 1.942431588660149E-13 -3.672978966239302E-13 4.798744627726343E-10 -6.17740889391802E-11 2.435437815546864E-10 1.16462431595837E-11
i -7.843248764871438E-16 1.493868811320146E-15 -1.130247186207626E-12 -1.340292475879593E-11 1.16462431595837E-11 2.636594405396337E-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 14.0   n/a MPO502176  
rotation period rot_per 3.8492 h n/a LCDB (Rev. 2019-August); 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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