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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 
[ show covariance matrix ]

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

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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 1.87851600814711 1.87851508777311 1.8785169285211 0.445683612600083 n/a 2436700.231356678 1.36445570358587 63.5879698040195 45.8837064484764 88.6556539497907 6122287.14440727 F 36 CATAB v2.0f-lin.ifort 2021-Feb-24 01:20:35 2021-Feb-24 01:20
1984-Jan-07 05:59 < 00:01 Jupiter 1.75105138959549 1.75105076010141 1.75105201909226 1.7863739317411 1.4912033149618 2445706.749325590 0.646259993411593 226.481175444861 86.8837380968862 -70.4017884614538 1191090.81889415 T 36 CATAB v2.0f-lin.ifort 2021-Feb-24 01:20:35 2021-Feb-24 01:20
2008-Jul-30 03:27 < 00:01 Jupiter 1.83749452914918 1.83749396448652 1.83749509403966 2.91406343430178 2.75133307422556 2454677.644061442 0.284221549709663 1385.35273959179 8.47173366732068 -89.0526020080015 1873776.22369212 T 36 CATAB v2.0f-lin.ifort 2021-Feb-24 01:20:35 2021-Feb-24 01:20
2089-Nov-18 23:51 00:01 Jupiter 1.8954740083803 1.89547295433234 1.8954750624289 0.599641211049208 n/a 2484374.493665072 1.48878711794467 230.326808890472 50.9841666564659 -86.7386492153591 5551732.48685312 F 36 CATAB v2.0f-lin.ifort 2021-Feb-24 01:20:35 2021-Feb-24 01:20
2114-Jul-12 23:05 00:02 Jupiter 1.73441667614453 1.73441602041769 1.7344173318769 2.06429961903882 1.81234922198408 2493375.461966248 1.57973447926549 242.343433449837 49.4594986048369 -73.0380262309825 1220306.44673681 T 36 CATAB v2.0f-lin.ifort 2021-Feb-24 01:20:35 2021-Feb-24 01:20
2139-Jan-21 15:10 00:02 Jupiter 1.79780809374982 1.79780696582557 1.79780922170923 3.0135349745874 2.85291245422428 2502334.131966381 2.05242033333097 727.062784244676 35.7924124062013 88.7165684007864 1537970.58681192 T 36 CATAB v2.0f-lin.ifort 2021-Feb-24 01:20:35 2021-Feb-24 01:20

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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