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4820 Fay (1985 RZ)
Classification: Main-belt Asteroid          SPK-ID: 2004820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3523106738691864 1.4696e-08  
a 2.857330608801921 1.0137e-08 au
q 1.850662536547864 4.0812e-08 au
i 12.4454594410572 6.0494e-07 deg
node 331.5408696006343 2.4375e-06 deg
peri 96.57394024304573 3.1818e-06 deg
M 82.59929451673344 2.718e-06 deg
tp 2458795.725631011764
(2019-Nov-08.22563101)
1.1561e-05 TDB
period 1764.164859861417
4.83
9.3878e-06
2.57e-08
d
yr
n .2040625613800513 1.0859e-09 deg/d
Q 3.863998681055979 1.3708e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2164  
   data-arc span      28489 days (78.00 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3938  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:58:55  

Additional Information
 Earth MOID = .912028 au 
 Jupiter MOID = 1.75059 au 
 T_jup = 3.176 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457219.5 (2015-Jul-16.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .349916940300136 1.4545e-08  
q 1.860132218482138 4.0209e-08 au
tp 2457031.327069755130
(2015-Jan-08.82706976)
7.4434e-06 TDB
node 331.6415178688991 2.4303e-06 deg
peri 96.74468979319683 3.1956e-06 deg
i 12.44876277162665 6.0511e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2164  
   data-arc span      28489 days (78.00 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3938  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:58:55  

Additional Information
 Jupiter MOID = 1.75059 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.115654927339898E-16 -5.774551747165315E-16 -8.556499736196227E-14 -5.096339973080981E-15 -2.423481047360323E-14 -1.14678064408437E-15
q -5.774551747165315E-16 1.616765818570481E-15 2.409788803271341E-13 1.452702484822546E-14 6.87068869233477E-14 3.296060064606187E-15
tp -8.556499736196227E-14 2.409788803271341E-13 5.540388058137504E-11 2.946831597366675E-13 1.624871835176402E-11 -2.453727869236918E-13
node -5.096339973080981E-15 1.452702484822546E-14 2.946831597366675E-13 5.906322213166929E-12 -5.32909271014158E-12 9.784779104163614E-13
peri -2.423481047360323E-14 6.87068869233477E-14 1.624871835176402E-11 -5.32909271014158E-12 1.021190492870639E-11 -1.014578032516315E-12
i -1.14678064408437E-15 3.296060064606187E-15 -2.453727869236918E-13 9.784779104163614E-13 -1.014578032516315E-12 3.66158375674324E-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 12.02   n/a E2021B10  
diameter diameter 8.599 km 0.568 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.73 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Sergison, D. (2010) Minor Planet Bull. 37, 33-34.]
geometric albedo albedo 0.455   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4820 Fay (1985 RZ)          Discovered 1985-Sep-15 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1959-May-11 17:33 00:01 Jupiter 1.87851631032397 1.87851576885213 1.8785168517959 0.4456830872598 n/a 2436700.231259524 1.2564815880486 34.6274653413779 4.17911541401087 -39.101204954526 42858603.7586569 F 37 CATAB v2.0f-lin.ifort 2021-Mar-16 17:00:15 2021-Mar-16 17:00
1984-Jan-07 05:59 < 00:01 Jupiter 1.7510517471799 1.75105163157284 1.75105186278726 1.78637423001339 1.49120373851726 2445706.749366796 0.567626285583837 59.6379679648485 30.3689799578231 -68.2795326969065 3853922.56184345 T 37 CATAB v2.0f-lin.ifort 2021-Mar-16 17:00:15 2021-Mar-16 17:00
2008-Jul-30 03:28 < 00:01 Jupiter 1.83749480409848 1.83749464022335 1.83749496797968 2.91406490258556 2.75133465442228 2454677.644140137 0.137102927490754 213.003149408918 3.90207437997256 -88.7188020511295 16421024.1037365 T 37 CATAB v2.0f-lin.ifort 2021-Mar-16 17:00:15 2021-Mar-16 17:00
2089-Nov-18 23:51 00:01 Jupiter 1.89547429971899 1.89547358930028 1.89547501014008 0.599639890856982 n/a 2484374.493597162 1.36848485892983 117.299729241718 11.3226950680202 -73.290951256954 23989744.45118 F 37 CATAB v2.0f-lin.ifort 2021-Mar-16 17:00:15 2021-Mar-16 17:00
2114-Jul-12 23:05 00:01 Jupiter 1.73441702952075 1.73441677880663 1.73441728023872 2.06430033783571 1.8123500956085 2493375.462036153 1.49090748318804 152.726162358944 13.994345922136 -67.1021141900312 5205630.20763033 T 37 CATAB v2.0f-lin.ifort 2021-Mar-16 17:00:15 2021-Mar-16 17:00
2139-Jan-21 15:10 00:02 Jupiter 1.79780838177929 1.79780751497201 1.79780924864308 3.01353657518136 2.85291417139159 2502334.132060462 1.93760580727007 531.229001325945 6.67081071091378 87.1455718351712 8372447.55935454 T 37 CATAB v2.0f-lin.ifort 2021-Mar-16 17:00:15 2021-Mar-16 17:00

Alternate Designations
 1985 RZ = 1943 ER = 1951 RV = 1951 TP = 1975 RH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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