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12538 (1998 OH)
Classification: Apollo [NEO, PHA]          SPK-ID: 2012538
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 416 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4060368604769372 9.9495e-09  
a 1.541841884029123 2.2892e-09 au
q .9157972460860925 1.5315e-08 au
i 24.52434709135365 6.2783e-07 deg
node 220.7387962008116 2.1208e-06 deg
peri 321.7095846003389 3.1133e-06 deg
M 316.2185065756659 2.4829e-06 deg
tp 2459285.544504739741
(2021-Mar-12.04450474)
4.9534e-06 TDB
period 699.2913971566345
1.91
1.5574e-06
4.264e-09
d
yr
n .5148068479946758 1.1465e-09 deg/d
Q 2.167886521972155 3.2187e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2324  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      10786 days (29.53 yr)  
   first obs. used      1991-10-10  
   last obs. used      2021-04-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40393  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-22 06:20:22  

Additional Information
 Earth MOID = .0297217 au 
 Jupiter MOID = 2.89754 au 
 T_jup = 4.280 
[ 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 15.9   n/a MPO492892  
diameter diameter 1.663 km 0.329 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 2.575 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Vaduvescu, O.; Aznar, A.M.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]
[Benishek, V. (2019) Minor Planet Bull. 46, 506-508.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.]
[Warner, B.D. (2019) Minor Planet Bull. 46, 157-160.]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 423-438.]
geometric albedo albedo 0.232   0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
SMASSII spectral type spec_B S:   n/a Binzel et al. (2004) Icarus 170, 259-294 SMASSIR data only, classification consistent with specified type, but uncertain

12538 (1998 OH)          Discovered 1998-Jul-19 by JPL/GEODSS NEAT at Haleakala
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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