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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 ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7622086047109154 8.9003e-08  
a 1.785681488787101 4.534e-09 AU
q .4246196927605746 1.5892e-07 AU
i 38.06955751722418 2.9005e-05 deg
node 302.291933615378 1.2338e-05 deg
peri 126.9204546348814 1.7525e-05 deg
M 310.7909895210716 7.394e-06 deg
tp 2457119.636970682811
(2015-Apr-07.13697068)
1.8298e-05 JED
period 871.5743118666771
2.39
3.3195e-06
9.088e-09
d
yr
n .4130456750486107 1.5731e-09 deg/d
Q 3.146743284813628 7.9899e-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      .6863  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:48:20  

Additional Information
 Earth MOID = .161453 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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 (675)
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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