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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 306 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5730839066521835 3.0308e-09  
a 2.38443523286056 3.3205e-09 au
q 1.017953774453721 6.9945e-09 au
i 5.865877303302812 1.9175e-06 deg
node 27.01552647444624 4.7785e-06 deg
peri 174.5661481723819 5.9952e-06 deg
M 12.10138707917709 7.1487e-07 deg
tp 2458955.292616229312
(2020-Apr-15.79261623)
2.6673e-06 TDB
period 1344.858903443528
3.68
2.8092e-06
7.691e-09
d
yr
n .2676860740396004 5.5916e-10 deg/d
Q 3.750916691267398 5.2235e-09 au
  Orbit Determination Parameters
   # obs. used (total)      5235  
   # 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      .21369  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-14 07:45:57  

Additional Information
 Earth MOID = .0154377 au 
 Jupiter MOID = 1.20745 au 
 T_jup = 3.286 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458104.5 (2017-Dec-17.0) TDB
Reference: JPL 306 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5727252702158157 3.0048e-09  
q 1.016880935119138 7.0178e-09 au
tp 2457613.849380773386
(2016-Aug-13.34938077)
3.8247e-06 TDB
node 27.06517785351406 4.7635e-06 deg
peri 174.4506086196864 5.9845e-06 deg
i 5.879436792982998 1.9189e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      5235  
   # 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      .21369  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-14 07:45:57  

Additional Information
 Jupiter MOID = 1.20745 au 
 T_jup = 3.286 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.028898387084464E-18 -2.067824533902355E-17 -3.372200260735298E-15 -4.691665256242032E-15 2.10114899992812E-15 2.891365588909245E-16
q -2.067824533902355E-17 4.925016849577754E-17 4.181422410141479E-15 1.121865088083749E-14 -5.004170955136743E-15 -5.719547010796652E-16
tp -3.372200260735298E-15 4.181422410141479E-15 1.462855080410262E-11 -1.425142460818318E-12 9.853498225232217E-12 -1.322718108363867E-13
node -4.691665256242032E-15 1.121865088083749E-14 -1.425142460818318E-12 2.26906973176311E-11 -2.412423065958044E-11 5.539456159963436E-14
peri 2.10114899992812E-15 -5.004170955136743E-15 9.853498225232217E-12 -2.412423065958044E-11 3.581416865557074E-11 5.726207527716017E-14
i 2.891365588909245E-16 -5.719547010796652E-16 -1.322718108363867E-13 5.539456159963436E-14 5.726207527716017E-14 3.682206801489224E-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 15.8   n/a MPO422042  
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. 2019-August); 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. 46-4, in press.]

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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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