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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 429 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .40603685995943 9.9027e-09  
a 1.541841884103304 2.2847e-09 au
q .915797246928067 1.5238e-08 au
i 24.5243470835148 6.2704e-07 deg
node 220.7387962531187 2.1134e-06 deg
peri 321.7095844496109 3.0988e-06 deg
M 316.218506606649 2.4792e-06 deg
tp 2459285.544504685694
(2021-Mar-12.04450469)
4.9462e-06 TDB
period 699.2913972071004
1.91
1.5543e-06
4.255e-09
d
yr
n .5148068479575236 1.1443e-09 deg/d
Q 2.167886521278541 3.2124e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2398  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      10806 days (29.59 yr)  
   first obs. used      1991-10-10  
   last obs. used      2021-05-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3996  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-12 05:53:05  

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 15.91   n/a MPCxxxxx  
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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