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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3524362622857887 1.4665e-08  
a 2.856734584458498 1.0004e-08 au
q 1.8499177251694 4.0773e-08 au
i 12.44579618757659 6.0436e-07 deg
node 331.5427244555624 2.4377e-06 deg
peri 96.53942046016221 3.178e-06 deg
M 122.6356084018263 2.881e-06 deg
tp 2458795.717387814027
(2019-Nov-08.21738781)
1.1504e-05 TDB
period 1763.61289519015
4.83
9.2638e-06
2.536e-08
d
yr
n .2041264276201527 1.0722e-09 deg/d
Q 3.863551443747597 1.3529e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2343  
   data-arc span      28601 days (78.31 yr)  
   first obs. used      1943-03-07  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:27:48  

Additional Information
 Earth MOID = .911575 au 
 Jupiter MOID = 1.75198 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 12.03   n/a MPO614063  
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 1.87851610239559 1.87851556552708 1.8785166392642 0.445683359915761 n/a 2436700.231390349 1.24250246788391 34.3434128352892 4.17400511805541 -39.1277978995489 42941239.700343 F 40 CATAB v2.0g-lin.ifort 2021-Jul-07 23:28:49 2021-Jul-07 23:28
1984-Jan-07 05:59 < 00:01 Jupiter 1.7510516427904 1.75105152727292 1.75105175830817 1.78637369253362 1.49120307710188 2445706.749369717 0.561527052943523 59.6001337306474 30.0596759773755 -68.4585708802828 3892033.62857489 T 40 CATAB v2.0g-lin.ifort 2021-Jul-07 23:28:49 2021-Jul-07 23:28
2008-Jul-30 03:28 < 00:01 Jupiter 1.83749474230888 1.83749457852723 1.83749490609658 2.91406400084261 2.75133369463647 2454677.644106495 0.136589689094707 212.788809339648 3.9016080537171 -88.7182474153018 16427326.5839961 T 40 CATAB v2.0g-lin.ifort 2021-Jul-07 23:28:49 2021-Jul-07 23:28
2089-Nov-18 23:51 00:01 Jupiter 1.89547418731705 1.89547348603483 1.89547488860158 0.599639785989955 n/a 2484374.493628881 1.35118215744366 115.916646454534 11.3073481302839 -73.3307837536414 24027474.1488941 F 40 CATAB v2.0g-lin.ifort 2021-Jul-07 23:28:49 2021-Jul-07 23:28
2114-Jul-12 23:05 00:01 Jupiter 1.73441693807117 1.73441668970864 1.73441718643755 2.06429935109983 1.81234895897873 2493375.462010654 1.47260276355707 150.912465463877 13.9834925177472 -67.1283422905362 5213541.29108315 T 40 CATAB v2.0g-lin.ifort 2021-Jul-07 23:28:49 2021-Jul-07 23:28
2139-Jan-21 15:10 00:02 Jupiter 1.79780829081545 1.79780743545409 1.79780914623189 3.01353546197074 2.85291298806238 2502334.132032345 1.91401374151775 524.98980876575 6.65729888808504 87.1526522379443 8385474.03883622 T 40 CATAB v2.0g-lin.ifort 2021-Jul-07 23:28:49 2021-Jul-07 23:28

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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