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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7620476628951327 1.0629e-07  
a 1.785066492630727 4.1062e-09 au
q .4247607438090699 1.8975e-07 au
i 38.13203828287903 3.4114e-05 deg
node 302.1538244429611 1.4879e-05 deg
peri 127.0278087047309 2.0644e-05 deg
M 139.6371205490899 8.734e-06 deg
tp 2458862.607612351600
(2020-Jan-14.10761235)
2.0161e-05 TDB
period 871.1240898917023
2.39
3.0057e-06
8.229e-09
d
yr
n .4132591489287766 1.4259e-09 deg/d
Q 3.145372241452384 7.2353e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45851  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:48:25  

Additional Information
 Earth MOID = .161631 au 
 Jupiter MOID = 2.8376 au 
 T_jup = 3.512 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455178.5 (2009-Dec-13.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7622677041144172 1.0607e-07  
q .4244849188571504 1.8931e-07 au
tp 2455376.479207626628
(2010-Jun-28.97920763)
1.2058e-05 TDB
node 302.3489070108531 1.4806e-05 deg
peri 126.8704461636002 2.0568e-05 deg
i 38.05079654465871 3.4149e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45851  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:48:25  

Additional Information
 Jupiter MOID = 2.8376 au 
 T_jup = 3.512 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.125168742381522E-14 -2.008066123120761E-14 -4.851691815236368E-13 6.759792328883931E-14 1.781833064714997E-12 2.963330296565085E-13
q -2.008066123120761E-14 3.583848838891179E-14 8.706787560248849E-13 -1.191093601935617E-13 -3.181412989430112E-12 -5.277126799179332E-13
tp -4.851691815236368E-13 8.706787560248849E-13 1.454021482749794E-10 -1.888068710988396E-11 -5.71931502353087E-11 -6.018014815123759E-11
node 6.759792328883931E-14 -1.191093601935617E-13 -1.888068710988396E-11 2.192059956353996E-10 -1.643776245387445E-10 2.046038060952814E-10
peri 1.781833064714997E-12 -3.181412989430112E-12 -5.71931502353087E-11 -1.643776245387445E-10 4.230604597861794E-10 -1.152400338702773E-10
i 2.963330296565085E-13 -5.277126799179332E-13 -6.018014815123759E-11 2.046038060952814E-10 -1.152400338702773E-10 1.166155809115823E-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 15.49   n/a E2021B10  
rotation period rot_per 17.5 h n/a LCDB (Rev. 2020-October); 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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