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5228 Maca (1986 VT)
Classification: Main-belt Asteroid          SPK-ID: 2005228
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1574971368324611 5.6718e-08  
a 3.111730950909737 2.7277e-08 au
q 2.621642235548502 1.7276e-07 au
i 1.26278105812701 7.0354e-06 deg
node 195.6103184982759 0.00023422 deg
peri 129.2917939882646 0.00023545 deg
M 183.952959703794 2.264e-05 deg
tp 2458380.955108358918
(2018-Sep-19.45510836)
0.00013104 JED
period 2004.940488720147
5.49
2.6362e-05
7.218e-08
d
yr
n .1795564516879032 2.3609e-09 deg/d
Q 3.601819666270972 3.1573e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1270  
   data-arc span      14649 days (40.11 yr)  
   first obs. used      1975-11-07  
   last obs. used      2015-12-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5206  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:55:27  

Additional Information
 Earth MOID = 1.6079 au 
 Jupiter MOID = 1.7217 au 
 T_jup = 3.199 
[ 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 12.7 mag n/a MPO337297  
diameter diameter 34.33 km 4.4 IRAS-A-FPA-3-RDR-IMPS-V5.0 IRAS observations used: 2
rotation period rot_per 9.8568 h n/a LCDB (Rev. 2015-December); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.0413   0.013 EAR-A-5-DDR-ALBEDOS-V1.0:IMPS IMPS quality code 1: at least two valid IRAS band observations used

5228 Maca (1986 VT)          Discovered 1986-Nov-03 by Vavrova, Z. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1986 VT = 1975 VY2 = 1989 EE2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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