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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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1207380014836822 4.1817e-08  
a 3.017272103642375 1.4691e-08 au
q 2.652972699916129 1.2836e-07 au
i 9.231957814684753 4.3391e-06 deg
node 308.8774915427892 2.4981e-05 deg
peri 68.70168257079004 2.9353e-05 deg
M 320.4875148212204 1.6002e-05 deg
tp 2459606.612547451947
(2022-Jan-27.11254745)
8.5648e-05 TDB
period 1914.344712575156
5.24
1.3981e-05
3.828e-08
d
yr
n .1880539056707984 1.3734e-09 deg/d
Q 3.381571507368621 1.6465e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2261  
   data-arc span      24798 days (67.89 yr)  
   first obs. used      1953-09-16  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42892  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:43:20  

Additional Information
 Earth MOID = 1.67039 au 
 Jupiter MOID = 2.17172 au 
 T_jup = 3.217 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456972.5 (2014-Nov-11.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1227054798035001 4.1086e-08  
q 2.642325601945734 1.2588e-07 au
tp 2457703.624683714714
(2016-Nov-11.12468371)
8.2038e-05 TDB
node 308.9182039157319 2.501e-05 deg
peri 70.29133480020106 2.9406e-05 deg
i 9.232789179994931 4.3351e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2261  
   data-arc span      24798 days (67.89 yr)  
   first obs. used      1953-09-16  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42892  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:43:20  

Additional Information
 Jupiter MOID = 2.17172 au 
 T_jup = 3.217 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.688092803802461E-15 -5.14675363569107E-15 -1.001768890273618E-12 -2.694329917068681E-15 -2.104628880234056E-13 -6.613942920876979E-16
q -5.14675363569107E-15 1.584485134652725E-14 3.187861525390694E-12 1.073375355054387E-14 6.515968746066783E-13 2.552321205614291E-15
tp -1.001768890273618E-12 3.187861525390694E-12 6.730169988675753E-9 -4.104401708050036E-12 1.288026783714213E-9 -5.88884679030411E-13
node -2.694329917068681E-15 1.073375355054387E-14 -4.104401708050036E-12 6.25486042415411E-10 -6.177893562191054E-10 3.588895362430424E-11
peri -2.104628880234056E-13 6.515968746066783E-13 1.288026783714213E-9 -6.177893562191054E-10 8.647221775939814E-10 -3.554692821093939E-11
i -6.613942920876979E-16 2.552321205614291E-15 -5.88884679030411E-13 3.588895362430424E-11 -3.554692821093939E-11 1.879286543277403E-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 12.23   n/a MPO636134  
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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