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JPL Small-Body Database Browser
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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 67 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7621001541706899 1.2395e-07  
a 1.785154960500893 4.1935e-09 au
q .4246880898845905 2.2138e-07 au
i 38.13178338940891 3.6538e-05 deg
node 302.155192245576 1.4968e-05 deg
peri 127.0295020851552 2.3053e-05 deg
M 56.96947890816345 8.7327e-06 deg
tp 2458862.635625507203
(2020-Jan-14.13562551)
2.0727e-05 TDB
period 871.1888500404528
2.39
3.0698e-06
8.405e-09
d
yr
n .4132284291554968 1.4561e-09 deg/d
Q 3.145621831117194 7.3894e-09 au
  Orbit Determination Parameters
   # obs. used (total)      265  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      16692 days (45.70 yr)  
   first obs. used      1974-06-26  
   last obs. used      2020-03-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46315  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Mar-09 06:08:27  

Additional Information
 Earth MOID = .162354 au 
 Jupiter MOID = 2.83702 au 
 T_jup = 3.511 
[ show covariance matrix ]

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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