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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 223 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7129113586735792 3.2797e-08  
a 2.174221328629132 9.0695e-09 au
q .6241942471790629 6.9247e-08 au
i 2.522413344015523 3.8261e-06 deg
node 74.98751441085663 0.00010902 deg
peri 98.23956153346755 0.00010891 deg
M 264.6362824189139 3.2219e-06 deg
tp 2459510.694952475163
(2021-Oct-23.19495248)		 1.2279e-05 TDB
period 1170.992340940438
3.21		 7.3269e-06
2.006e-08		 d
yr
n .3074315581866911 1.9236e-09 deg/d
Q 3.724248410079201 1.5535e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46568  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:28:30  

Additional Information
 Earth MOID = .00324024 au 
 Jupiter MOID = 1.24587 au 
 T_jup = 3.299 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457355.5 (2015-Nov-29.0) TDB
Reference: JPL 223 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7131228335381896 3.2826e-08  
q .6238411061987366 6.9324e-08 au
tp 2457168.245475854804
(2015-May-25.74547585)		 5.3192e-06 TDB
node 75.01107893454824 0.00010904 deg
peri 98.22528886775208 0.00010893 deg
i 2.522439013571715 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46568  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:28:30  

Additional Information
 Jupiter MOID = 1.24587 au 
 T_jup = 3.299 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.077548764069478E-15 -2.275030743456588E-15 -3.602465516490421E-15 -1.599957849135157E-15 5.394223044229781E-14 7.351530942883631E-16
q -2.275030743456588E-15 4.805751091263624E-15 -3.839241030232001E-16 2.223700683475688E-14 -1.33052684600017E-13 -1.406638675625861E-15
tp -3.602465516490421E-15 -3.839241030232001E-16 2.829395288214616E-11 2.795983000055696E-11 -2.467960724394747E-11 -3.001278289599874E-13
node -1.599957849135157E-15 2.223700683475688E-14 2.795983000055696E-11 1.188977136324941E-8 -1.187193618153595E-8 -1.810052698085067E-10
peri 5.394223044229781E-14 -1.33052684600017E-13 -2.467960724394747E-11 -1.187193618153595E-8 1.18654782210945E-8 1.808496778979571E-10
i 7.351530942883631E-16 -1.406638675625861E-15 -3.001278289599874E-13 -1.810052698085067E-10 1.808496778979571E-10 1.463322215262498E-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 15.25   n/a MPCxxxxx 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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