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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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3523106741430926 1.4696e-08  
a 2.857330609519876 1.0136e-08 au
q 1.850662536230235 4.0812e-08 au
i 12.44545945643646 6.0493e-07 deg
node 331.540869594513 2.4375e-06 deg
peri 96.57394022389461 3.1818e-06 deg
M 82.59929444491628 2.7179e-06 deg
tp 2458795.725631211141
(2019-Nov-08.22563121)
1.1561e-05 TDB
period 1764.164860526333
4.83
9.387e-06
2.57e-08
d
yr
n .2040625613031399 1.0858e-09 deg/d
Q 3.863998682809517 1.3707e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2168  
   data-arc span      28500 days (78.03 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-03-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39349  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:49:15  

Additional Information
 Earth MOID = .912028 au 
 Jupiter MOID = 1.75059 au 
 T_jup = 3.176 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457220.5 (2015-Jul-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3499190073324101 1.4545e-08  
q 1.860130741928759 4.0209e-08 au
tp 2457031.327430046072
(2015-Jan-08.82743005)
7.4433e-06 TDB
node 331.6415183894866 2.4303e-06 deg
peri 96.74472757370202 3.1956e-06 deg
i 12.4487621828423 6.0511e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2168  
   data-arc span      28500 days (78.03 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-03-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39349  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:49:15  

Additional Information
 Jupiter MOID = 1.75059 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.115581928865892E-16 -5.774449375507383E-16 -8.556236377586036E-14 -5.096304571989262E-15 -2.423408754943921E-14 -1.14685920797983E-15
q -5.774449375507383E-16 1.616759002213396E-15 2.409757088516362E-13 1.452701232038311E-14 6.87061000506853E-14 3.296227534759781E-15
tp -8.556236377586036E-14 2.409757088516362E-13 5.540269450385074E-11 2.946843485350286E-13 1.624838832271029E-11 -2.453273276989477E-13
node -5.096304571989262E-15 1.452701232038311E-14 2.946843485350286E-13 5.906315466255878E-12 -5.329085730990173E-12 9.784821600867496E-13
peri -2.423408754943921E-14 6.87061000506853E-14 1.624838832271029E-11 -5.329085730990173E-12 1.021180297307641E-11 -1.014566209817773E-12
i -1.14685920797983E-15 3.296227534759781E-15 -2.453273276989477E-13 9.784821600867496E-13 -1.014566209817773E-12 3.661563528557158E-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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