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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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3523106833614587 3.6021e-08  
a 2.857330608729674 1.097e-08 au
q 1.85066250937851 1.0205e-07 au
i 12.44545288428334 4.5784e-06 deg
node 331.5408492460368 1.9965e-05 deg
peri 96.57396338570067 2.092e-05 deg
M 82.59929360369797 5.1015e-06 deg
tp 2458795.725635501408
(2019-Nov-08.22563550)
2.4869e-05 TDB
period 1764.164859794507
4.83
1.016e-05
2.782e-08
d
yr
n .2040625613877909 1.1752e-09 deg/d
Q 3.863998708080838 1.4835e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2099  
   data-arc span      28441 days (77.87 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:20:30  

Additional Information
 Earth MOID = .912028 au 
 Jupiter MOID = 1.75059 au 
 T_jup = 3.176 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457167.5 (2015-May-25.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3498203117526619 3.6042e-08  
q 1.860173796950139 1.0198e-07 au
tp 2457031.310644233356
(2015-Jan-08.81064423)
2.7487e-05 TDB
node 331.6416480995355 1.9925e-05 deg
peri 96.74152279225262 2.0901e-05 deg
i 12.44867256742751 4.5788e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2099  
   data-arc span      28441 days (77.87 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:20:30  

Additional Information
 Jupiter MOID = 1.75059 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.299028962600983E-15 -3.666269797060219E-15 -7.122463776467123E-14 4.426086922782E-15 -3.664351300209492E-14 -5.944798101244534E-15
q -3.666269797060219E-15 1.040035971213866E-14 1.165524697640276E-13 -1.246460702684033E-14 8.243086468954308E-14 1.554782899839356E-14
tp -7.122463776467123E-14 1.165524697640276E-13 7.555260463087032E-10 1.316664574419108E-12 1.912481417300759E-10 1.138594238144342E-12
node 4.426086922782E-15 -1.246460702684033E-14 1.316664574419108E-12 3.97009916568635E-10 -3.871983758507242E-10 4.108803029901378E-12
peri -3.664351300209492E-14 8.243086468954308E-14 1.912481417300759E-10 -3.871983758507242E-10 4.3685775785931E-10 -3.66249578548547E-12
i -5.944798101244534E-15 1.554782899839356E-14 1.138594238144342E-12 4.108803029901378E-12 -3.66249578548547E-12 2.096539957699805E-11

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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