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5660 (1974 MA)
Classification: Apollo [NEO]          SPK-ID: 2005660
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7621417416166989 8.8896e-08  
a 1.785438258407645 4.5521e-09 au
q .4246812345957568 1.5873e-07 au
i 38.06832436946276 2.9003e-05 deg
node 302.2903673637289 1.2343e-05 deg
peri 126.9131174797682 1.7526e-05 deg
M 198.6814521989048 8.242e-06 deg
tp 2457990.978822321605
(2017-Aug-25.47882232)
2.1308e-05 JED
period 871.3962402457445
2.39
3.3325e-06
9.124e-09
d
yr
n .4131300817851539 1.58e-09 deg/d
Q 3.146195282219534 8.0214e-09 au
  Orbit Determination Parameters
   # obs. used (total)      166  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      14653 days (40.12 yr)  
   first obs. used      1974-06-26  
   last obs. used      2014-08-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .68701  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:48:20  

Additional Information
 Earth MOID = .160846 au 
 Jupiter MOID = 2.8423 au 
 T_jup = 3.511 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4 mag n/a MPO256905  
rotation period rot_per 17.5 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Incomplete or inconclusive result.
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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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