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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3523106741587756 1.4688e-08  
a 2.857330609528821 1.0111e-08 au
q 1.850662536191217 4.0803e-08 au
i 12.44545945060542 6.0484e-07 deg
node 331.5408695945715 2.4375e-06 deg
peri 96.57394022840361 3.1812e-06 deg
M 82.59929444232174 2.7148e-06 deg
tp 2458795.725631221955
(2019-Nov-08.22563122)
1.1551e-05 TDB
period 1764.164860534617
4.83
9.3641e-06
2.564e-08
d
yr
n .2040625613021816 1.0832e-09 deg/d
Q 3.863998682866425 1.3673e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2189  
   data-arc span      28506 days (78.05 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39219  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:53:11  

Additional Information
 Earth MOID = .912028 au 
 Jupiter MOID = 1.75059 au 
 T_jup = 3.176 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457268.5 (2015-Sep-03.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3500220763950951 1.4537e-08  
q 1.860008498006219 4.0212e-08 au
tp 2457031.343967375197
(2015-Jan-08.84396738)
7.4403e-06 TDB
node 331.6415258601909 2.4303e-06 deg
peri 96.74386450292072 3.1952e-06 deg
i 12.44859089821336 6.0508e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2189  
   data-arc span      28506 days (78.05 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39219  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:53:11  

Additional Information
 Jupiter MOID = 1.75059 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.113240574436451E-16 -5.772016788716509E-16 -8.547765528205593E-14 -5.09506085596124E-15 -2.421537027831634E-14 -1.149271137432706E-15
q -5.772016788716509E-16 1.617027323252744E-15 2.409130592071025E-13 1.452790697112453E-14 6.870325056941705E-14 3.302283754498127E-15
tp -8.547765528205593E-14 2.409130592071025E-13 5.535879614623276E-11 2.948512834082495E-13 1.62381541588359E-11 -2.437128539810728E-13
node -5.09506085596124E-15 1.452790697112453E-14 2.948512834082495E-13 5.906379385952498E-12 -5.329061735309437E-12 9.787488904942712E-13
peri -2.421537027831634E-14 6.870325056941705E-14 1.62381541588359E-11 -5.329061735309437E-12 1.020943993181961E-11 -1.014247866936943E-12
i -1.149271137432706E-15 3.302283754498127E-15 -2.437128539810728E-13 9.787488904942712E-13 -1.014247866936943E-12 3.661251220421214E-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

[ show close-approach data ]
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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