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2201 Oljato (1947 XC)
Classification: Apollo [NEO, PHA]          SPK-ID: 2002201
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 222 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7128855022994617 3.2802e-08  
a 2.174083937430176 9.0721e-09 au
q .6242110176540735 6.9254e-08 au
i 2.522424349897153 3.8261e-06 deg
node 74.9869941558628 0.00010902 deg
peri 98.2472872021865 0.00010891 deg
M 203.1157355301823 2.8757e-06 deg
tp 2459510.757942034113
(2021-Oct-23.25794203)
1.2282e-05 TDB
period 1170.881348445373
3.21
7.3289e-06
2.007e-08
d
yr
n .3074607008455524 1.9245e-09 deg/d
Q 3.723956857206278 1.554e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1042  
   # delay obs. used      0  
   # Doppler obs. used      5  
   data-arc span      32542 days (89.10 yr)  
   first obs. used      1931-12-03  
   last obs. used      2021-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4656  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-06 05:22:16  

Additional Information
 Earth MOID = .00312536 au 
 Jupiter MOID = 1.24708 au 
 T_jup = 3.299 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457355.5 (2015-Nov-29.0) TDB
Reference: JPL 222 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7131228332348544 3.2826e-08  
q .6238411066613726 6.9324e-08 au
tp 2457168.245477100377
(2015-May-25.74547710)
5.3187e-06 TDB
node 75.01107894828121 0.00010904 deg
peri 98.22528889227085 0.00010893 deg
i 2.522439015560203 3.8253e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1042  
   # delay obs. used      0  
   # Doppler obs. used      5  
   data-arc span      32542 days (89.10 yr)  
   first obs. used      1931-12-03  
   last obs. used      2021-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4656  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-06 05:22:16  

Additional Information
 Jupiter MOID = 1.24708 au 
 T_jup = 3.299 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.077553220540036E-15 -2.275039494251514E-15 -3.58069431745004E-15 -1.602442552686795E-15 5.394564834180942E-14 7.35197513478225E-16
q -2.275039494251514E-15 4.805768365143808E-15 -4.292224133181501E-16 2.22418353813706E-14 -1.330593726626241E-13 -1.406727165224745E-15
tp -3.58069431745004E-15 -4.292224133181501E-16 2.828884300513629E-11 2.796297973185473E-11 -2.468111096952222E-11 -3.002293313058796E-13
node -1.602442552686795E-15 2.22418353813706E-14 2.796297973185473E-11 1.188976734391328E-8 -1.187193244622109E-8 -1.810051694223917E-10
peri 5.394564834180942E-14 -1.330593726626241E-13 -2.468111096952222E-11 -1.187193244622109E-8 1.186547488719696E-8 1.808495796887801E-10
i 7.35197513478225E-16 -1.406727165224745E-15 -3.002293313058796E-13 -1.810051694223917E-10 1.808495796887801E-10 1.463322021861756E-11

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 15.3   n/a MPO492776 IRAS observations used: 11
diameter diameter 1.80 km 0.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 26. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1995) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.4328   0.030 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2201 Oljato (1947 XC)          Discovered 1947-Dec-12 by Giclas, H. L. at Flagstaff (LO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1947 XC = 1979 VU2 = 1979 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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