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2984 Chaucer (1981 YD)
Classification: Main-belt Asteroid          SPK-ID: 2002984
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1358389111931936 3.0062e-08  
a 2.469950484182861 6.9744e-09 au
q 2.13443509971036 7.5794e-08 au
i 3.053858847422816 3.4359e-06 deg
node 81.804687108103 5.9449e-05 deg
peri 46.28533384712129 6.0715e-05 deg
M 342.7012300330715 1.2287e-05 deg
tp 2459268.630804955764
(2021-Feb-23.13080496)
4.8437e-05 TDB
period 1417.85166407585
3.88
6.0054e-06
1.644e-08
d
yr
n .2539052632382715 1.0754e-09 deg/d
Q 2.805465868655362 7.9218e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2494  
   data-arc span      24655 days (67.50 yr)  
   first obs. used      1953-09-17  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44209  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:39:28  

Additional Information
 Earth MOID = 1.15083 au 
 Jupiter MOID = 2.24342 au 
 T_jup = 3.470 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457156.5 (2015-May-14.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1345166460485008 3.0048e-08  
q 2.138096653563646 7.568e-08 au
tp 2457851.106413919544
(2017-Apr-07.60641392)
4.8466e-05 TDB
node 81.82667430370256 5.9483e-05 deg
peri 46.35290929941156 6.0775e-05 deg
i 3.053262986377498 3.4337e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2494  
   data-arc span      24655 days (67.50 yr)  
   first obs. used      1953-09-17  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44209  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:39:28  

Additional Information
 Jupiter MOID = 2.24342 au 
 T_jup = 3.470 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.028686747467414E-16 -2.267042172982554E-15 -1.517618184578038E-13 2.323348897626043E-16 -3.32839562584667E-14 2.371309523543502E-16
q -2.267042172982554E-15 5.72739522941541E-15 3.816978986316337E-13 -6.613344111735445E-16 7.9192867084091E-14 -5.365531778580032E-16
tp -1.517618184578038E-13 3.816978986316337E-13 2.348965964114351E-9 -1.173299003284432E-11 6.125349911548003E-10 1.052060988416873E-13
node 2.323348897626043E-16 -6.613344111735445E-16 -1.173299003284432E-11 3.538232098056597E-9 -3.535887714209997E-9 -3.526002391197752E-12
peri -3.32839562584667E-14 7.9192867084091E-14 6.125349911548003E-10 -3.535887714209997E-9 3.693631346728196E-9 3.538607139635165E-12
i 2.371309523543502E-16 -5.365531778580032E-16 1.052060988416873E-13 -3.526002391197752E-12 3.538607139635165E-12 1.179001771770934E-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 13.29   n/a E2021B10  
diameter diameter 15.377 km 0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2984 Chaucer (1981 YD)          Discovered 1981-Dec-30 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 YD = 1963 FB = 1965 UK1 = 1971 FZ = 1971 JA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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