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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .135830690657267 2.9949e-08  
a 2.469890634636915 6.847e-09 au
q 2.134403683886267 7.5417e-08 au
i 3.053769532706008 3.3216e-06 deg
node 81.80198272016841 5.8967e-05 deg
peri 46.24640206319469 6.0171e-05 deg
M 32.49919532942358 1.1707e-05 deg
tp 2459268.507323965513
(2021-Feb-23.00732397)
4.6049e-05 TDB
period 1417.800130291181
3.88
5.8956e-06
1.614e-08
d
yr
n .2539144921125552 1.0558e-09 deg/d
Q 2.805377585387563 7.777e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2650  
   data-arc span      24736 days (67.72 yr)  
   first obs. used      1953-09-17  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43914  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:07:52  

Additional Information
 Earth MOID = 1.15143 au 
 Jupiter MOID = 2.2433 au 
 T_jup = 3.470 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457285.5 (2015-Sep-20.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1344664469536668 2.9937e-08  
q 2.13829269065186 7.5303e-08 au
tp 2457851.216470307240
(2017-Apr-07.71647031)
4.6461e-05 TDB
node 81.82396094709932 5.9e-05 deg
peri 46.36970068343827 6.0229e-05 deg
i 3.053184522751016 3.3193e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2650  
   data-arc span      24736 days (67.72 yr)  
   first obs. used      1953-09-17  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43914  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:07:52  

Additional Information
 Jupiter MOID = 2.2433 au 
 T_jup = 3.470 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.962472229142258E-16 -2.247688068599185E-15 -1.186189783968544E-13 1.363796185201961E-15 -2.731320047178003E-14 9.118178539265784E-17
q -2.247688068599185E-15 5.670599719811068E-15 2.819489687088861E-13 -3.498454191282734E-15 6.061932767149731E-14 -1.643780858792372E-16
tp -1.186189783968544E-13 2.819489687088861E-13 2.158618834404529E-9 -1.117603366974283E-11 5.713022612945162E-10 1.608375397362886E-13
node 1.363796185201961E-15 -3.498454191282734E-15 -1.117603366974283E-11 3.480959084103495E-9 -3.478557326253648E-9 2.952729677058346E-12
peri -2.731320047178003E-14 6.061932767149731E-14 5.713022612945162E-10 -3.478557326253648E-9 3.627559372740096E-9 -2.92084937670345E-12
i 9.118178539265784E-17 -1.643780858792372E-16 1.608375397362886E-13 2.952729677058346E-12 -2.92084937670345E-12 1.101791550462202E-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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