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52768 (1998 OR2)
Classification: Amor [NEO, PHA]          SPK-ID: 2052768
[ 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 311 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5732457987597231 3.0198e-09  
a 2.384402849788191 3.3201e-09 au
q 1.017553933596399 6.9624e-09 au
i 5.86638312738149 1.9135e-06 deg
node 26.98509965989455 4.7441e-06 deg
peri 174.5829133145018 5.9582e-06 deg
M 65.6327053916097 7.2153e-07 deg
tp 2458955.319638665965
(2020-Apr-15.81963867)		 2.6579e-06 TDB
period 1344.831506694774
3.68		 2.8089e-06
7.69e-09		 d
yr
n .2676915273087118 5.5911e-10 deg/d
Q 3.751251765979983 5.2233e-09 au
   Orbit Determination Parameters
   # obs. used (total)      5309  
   # delay obs. used      3  
   # Doppler obs. used      0  
   data-arc span      12131 days (33.21 yr)  
   first obs. used      1987-06-30  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .21439  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 21:01:47  

Additional Information
 Earth MOID = .0142261 au 
 Jupiter MOID = 1.20599 au 
 T_jup = 3.286 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458108.5 (2017-Dec-21.0) TDB
Reference: JPL 311 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5727235551786519 2.991e-09  
q 1.016887289574817 6.9844e-09 au
tp 2457613.849556374172
(2016-Aug-13.34955637)		 3.8222e-06 TDB
node 27.06522210280664 4.7295e-06 deg
peri 174.4508052003115 5.9503e-06 deg
i 5.879425565206744 1.9147e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      5309  
   # delay obs. used      3  
   # Doppler obs. used      0  
   data-arc span      12131 days (33.21 yr)  
   first obs. used      1987-06-30  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .21439  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 21:01:47  

Additional Information
 Jupiter MOID = 1.20599 au 
 T_jup = 3.286 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.946294949815009E-18 -2.048163118786673E-17 -3.373624928358138E-15 -4.585712936650345E-15 1.998019015872265E-15 2.815195153664941E-16
q -2.048163118786673E-17 4.878215299766556E-17 4.184627407343172E-15 1.096629818304202E-14 -4.75882895322195E-15 -5.543187205334762E-16
tp -3.373624928358138E-15 4.184627407343172E-15 1.460949880257215E-11 -1.396591385043459E-12 9.801868537014423E-12 -1.33354607972201E-13
node -4.585712936650345E-15 1.096629818304202E-14 -1.396591385043459E-12 2.236862030050986E-11 -2.377306410669774E-11 6.807032410122849E-14
peri 1.998019015872265E-15 -4.75882895322195E-15 9.801868537014423E-12 -2.377306410669774E-11 3.540554304956726E-11 4.246000474890532E-14
i 2.815195153664941E-16 -5.543187205334762E-16 -1.33354607972201E-13 6.807032410122849E-14 4.246000474890532E-14 3.66603551624808E-12

[ 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 16.00   n/a E2021B10  
diameter diameter 1.75 km 0.3 Arecibo initial assessment April 16-22, 2020 (S. Marshall, P. Taylor)  
rotation period rot_per 4.1120 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Koehn, B.W.; Bowell, E.L.G.; Skiff, B.A.; Sanborn, J.J.; et al. (2014) Minor Planet Bull. 41, 286-300.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Franco, L.; Marchini, A.; Saya, L.-F.; Galli, G.; et al. (2020) Minor Planet Bull. 47, 242-246.]
[Observers at Arecibo Observatory (2020). https://www.ucf.edu/news/asteroid-visiting-earths-neighborhood-brin gs-its-own-face-mask/]
[Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 200-213.]
[Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 290-304.]

52768 (1998 OR2)          Discovered 1998-Jul-24 by NEAT at Haleakala
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

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