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4668 Rayjay (1987 DX5)
Classification: Main-belt Asteroid          SPK-ID: 2004668
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .120737996913015 4.2835e-08  
a 3.017272100594809 1.6057e-08 au
q 2.652972711027467 1.3029e-07 au
i 9.231957834268339 4.3464e-06 deg
node 308.8774908785078 2.5962e-05 deg
peri 68.70168157367941 3.0388e-05 deg
M 320.4875175740561 1.7048e-05 deg
tp 2459606.612532495068
(2022-Jan-27.11253250)
9.1409e-05 TDB
period 1914.344709674808
5.24
1.5281e-05
4.184e-08
d
yr
n .1880539059557114 1.5011e-09 deg/d
Q 3.381571490162151 1.7995e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2173  
   data-arc span      24756 days (67.78 yr)  
   first obs. used      1953-09-16  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43331  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:19:41  

Additional Information
 Earth MOID = 1.67039 au 
 Jupiter MOID = 2.17172 au 
 T_jup = 3.217 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456836.5 (2014-Jun-28.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1228286590204402 4.2115e-08  
q 2.641602717541713 1.2786e-07 au
tp 2457703.674934290192
(2016-Nov-11.17493429)
8.5843e-05 TDB
node 308.920378923764 2.5994e-05 deg
peri 70.32642131007155 3.0423e-05 deg
i 9.232783592724578 4.3426e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2173  
   data-arc span      24756 days (67.78 yr)  
   first obs. used      1953-09-16  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43331  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:19:41  

Additional Information
 Jupiter MOID = 2.17172 au 
 T_jup = 3.217 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.773673707550169E-15 -5.354855029603996E-15 -7.633636653715676E-13 -2.121473158355526E-15 -1.790117291924996E-13 -6.369433761543494E-16
q -5.354855029603996E-15 1.634910590944772E-14 2.601964910937072E-12 9.087052496133204E-15 5.744499869984566E-13 2.505329560528673E-15
tp -7.633636653715676E-13 2.601964910937072E-12 7.369050913622891E-9 -5.504443726675636E-12 1.374846785862586E-9 -4.25294292238386E-13
node -2.121473158355526E-15 9.087052496133204E-15 -5.504443726675636E-12 6.756812369118038E-10 -6.675760724511302E-10 3.417284012718948E-11
peri -1.790117291924996E-13 5.744499869984566E-13 1.374846785862586E-9 -6.675760724511302E-10 9.255383868296706E-10 -3.383051860895741E-11
i -6.369433761543494E-16 2.505329560528673E-15 -4.25294292238386E-13 3.417284012718948E-11 -3.383051860895741E-11 1.885788507562299E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2   n/a MPO473830  
diameter diameter 13.911 km 0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.506 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Odden, C.E.; Jusuf, J.M.; Keefe, O.R.; Wang, A.; Zaeder, E.A. (2017) Minor Planet Bull. 44, 181-182.]
geometric albedo albedo 0.159   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4668 Rayjay           Discovered 1987 Feb. 21 by H. Debehogne at the European Southern Observatory.
Sri Lankan-born and raised Ray Jayawardhana (b. 1971), known as "RayJay", is an astronomer at the University of Toronto, and an award-winning science writer. Name suggested by the SGAC Name An Asteroid Campaign.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-09-09Last Updated: 2014-11-10

Alternate Designations
 1987 DX5 = 1954 YE = 1974 SN2 = 1979 QZ7 = 1979 SK1 = 1985 VP5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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