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1660 Wood (1953 GA)
Classification: Main-belt Asteroid          SPK-ID: 2001660
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3008228973741273 9.2421e-09  
a 2.396630539858227 5.0792e-09 au
q 1.675669196922756 2.1554e-08 au
i 20.56233291241828 9.7497e-07 deg
node 212.8903335159002 2.8386e-06 deg
peri 276.7747633282578 3.3395e-06 deg
M 141.6189829626893 2.7145e-06 deg
tp 2458667.387296995291
(2019-Jul-02.88729700)
9.2512e-06 TDB
period 1355.189601469305
3.71
4.3081e-06
1.179e-08
d
yr
n .2656454857753379 8.4448e-10 deg/d
Q 3.117591882793697 6.6072e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2878  
   data-arc span      32679 days (89.47 yr)  
   first obs. used      1931-05-20  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38144  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 12:57:09  

Additional Information
 Earth MOID = .82083 au 
 Jupiter MOID = 2.34758 au 
 T_jup = 3.383 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456992.5 (2014-Dec-01.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3016262394938839 9.2431e-09  
q 1.672695107897172 2.1581e-08 au
tp 2457313.815067702873
(2015-Oct-18.31506770)
7.9624e-06 TDB
node 212.9508058095287 2.8408e-06 deg
peri 276.6960411661009 3.335e-06 deg
i 20.57034138902182 9.7461e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2878  
   data-arc span      32679 days (89.47 yr)  
   first obs. used      1931-05-20  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38144  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 12:57:09  

Additional Information
 Jupiter MOID = 2.34758 au 
 T_jup = 3.383 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.543529610496093E-17 -1.968838635493084E-16 5.571414448055865E-14 -5.416528141670227E-15 2.101073580654846E-14 2.497213634647854E-15
q -1.968838635493084E-16 4.65735927119139E-16 -1.324434891528403E-13 1.252428579024942E-14 -4.997155312740085E-14 -5.745153944656666E-15
tp 5.571414448055865E-14 -1.324434891528403E-13 6.340039409186204E-11 1.066221460373728E-12 1.840086165199314E-11 1.673764750882654E-12
node -5.416528141670227E-15 1.252428579024942E-14 1.066221460373728E-12 8.070192125232077E-12 -6.252657614895967E-12 -2.209258614582262E-12
peri 2.101073580654846E-14 -4.997155312740085E-14 1.840086165199314E-11 -6.252657614895967E-12 1.112193609763806E-11 2.542332007349622E-12
i 2.497213634647854E-15 -5.745153944656666E-15 1.673764750882654E-12 -2.209258614582262E-12 2.542332007349622E-12 9.498671060122442E-13

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 11.71   n/a E2021B10  
diameter diameter 11.342 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.8090 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Hills, K. (2012) Minor Planet Bull. 39, 239-240.]
[Oey, J.; Alvarez, E.M. (2012) Minor Planet Bull. 39, 147-148.]
[Han, X.L.; Li, B.; Zhao, H. (2013) Minor Planet Bull. 40, 14-15.]
geometric albedo albedo 0.239   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B S   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)

1660 Wood (1953 GA)          Discovered 1953-Apr-07 by Bruwer, J. A. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1953 GA = 1931 KL = 1933 YC = 1951 RD1 = 1955 VQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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