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5660 (1974 MA)
Classification: Apollo [NEO]          SPK-ID: 2005660
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 69 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7621000582673575 1.0611e-07  
a 1.785154960689293 4.131e-09 au
q .4246882611317205 1.8947e-07 au
i 38.13176071841984 3.3786e-05 deg
node 302.1551885293708 1.4794e-05 deg
peri 127.0294894825405 2.0569e-05 deg
M 56.96947629522051 8.4842e-06 deg
tp 2458862.635631808620
(2020-Jan-14.13563181)
2.0131e-05 TDB
period 871.188850178367
2.39
3.024e-06
8.279e-09
d
yr
n .4132284290900804 1.4344e-09 deg/d
Q 3.145621660246865 7.2792e-09 au
  Orbit Determination Parameters
   # obs. used (total)      272  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      16737 days (45.82 yr)  
   first obs. used      1974-06-26  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47212  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Apr-23 07:01:00  

Additional Information
 Earth MOID = .162354 au 
 Jupiter MOID = 2.83702 au 
 T_jup = 3.511 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455199.5 (2010-Jan-03.0) TDB
Reference: JPL 69 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .762260462203556 1.0578e-07  
q .4245059974066677 1.8878e-07 au
tp 2455376.479368842274
(2010-Jun-28.97936884)
1.205e-05 TDB
node 302.349350803369 1.4722e-05 deg
peri 126.868756579975 2.0503e-05 deg
i 38.05027251485407 3.382e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      272  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      16737 days (45.82 yr)  
   first obs. used      1974-06-26  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47212  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Apr-23 07:01:00  

Additional Information
 Jupiter MOID = 2.83702 au 
 T_jup = 3.511 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.118888366103032E-14 -1.996874173835562E-14 -4.8158961148184E-13 6.539620787657912E-14 1.773380291561427E-12 2.886984437947603E-13
q -1.996874173835562E-14 3.563904318637038E-14 8.642952107771507E-13 -1.151826598248899E-13 -3.166352895858345E-12 -5.141206819921963E-13
tp -4.8158961148184E-13 8.642952107771507E-13 1.451958524891202E-10 -1.838985326953222E-11 -5.699951770519056E-11 -5.868094545425758E-11
node 6.539620787657912E-14 -1.151826598248899E-13 -1.838985326953222E-11 2.16742721054064E-10 -1.627592377082008E-10 1.971921113030381E-10
peri 1.773380291561427E-12 -3.166352895858345E-12 -5.699951770519056E-11 -1.627592377082008E-10 4.203870720602042E-10 -1.105351188651972E-10
i 2.886984437947603E-13 -5.141206819921963E-13 -5.868094545425758E-11 1.971921113030381E-10 -1.105351188651972E-10 1.14380132402628E-9

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 15.5   n/a MPO473844  
rotation period rot_per 17.5 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2005) http://www.asu.cas.cz/~ppravec/neo.htm]
SMASSII spectral type spec_B Q   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

5660 (1974 MA)          Discovered 1974-Jun-26 by Kowal, C. T. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1974 MA = 1993 OL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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