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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 211 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7128855212674332 3.2939e-08  
a 2.174083942076455 9.1281e-09 au
q .6242109777501252 6.9534e-08 au
i 2.522429202495983 4.1235e-06 deg
node 74.98703322352544 0.00010929 deg
peri 98.24724876350736 0.00010919 deg
M 203.1157336122513 2.8846e-06 deg
tp 2459510.757949907808
(2021-Oct-23.25794991)
1.2329e-05 TDB
period 1170.881352198845
3.21
7.3741e-06
2.019e-08
d
yr
n .3074606998599317 1.9364e-09 deg/d
Q 3.723956906402784 1.5635e-08 au
  Orbit Determination Parameters
   # obs. used (total)      976  
   # delay obs. used      0  
   # Doppler obs. used      5  
   data-arc span      32135 days (87.98 yr)  
   first obs. used      1931-12-03  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47477  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-26 05:03:15  

Additional Information
 Earth MOID = .00312534 au 
 Jupiter MOID = 1.24708 au 
 T_jup = 3.299 
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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 211 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7127982819789689 3.2179e-08  
q .6237348655452509 6.9879e-08 au
tp 2457168.238327528459
(2015-May-25.73832753)
5.3802e-06 TDB
node 74.99681088192294 0.00010936 deg
peri 98.21240077094922 0.00010926 deg
i 2.523619586182001 4.1231e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      976  
   # delay obs. used      0  
   # Doppler obs. used      5  
   data-arc span      32135 days (87.98 yr)  
   first obs. used      1931-12-03  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47477  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-26 05:03:15  

Additional Information
 Jupiter MOID = 1.24708 au 
 T_jup = 3.299 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.035496283173264E-15 -2.248568444113731E-15 -2.688976321984401E-15 -9.91896847989974E-15 5.483510199779694E-14 8.203994108512637E-16
q -2.248568444113731E-15 4.883060814885102E-15 6.60218370968634E-15 2.389664576145591E-14 -1.227252405554754E-13 -1.813832275261841E-15
tp -2.688976321984401E-15 6.60218370968634E-15 2.894671884991875E-11 2.809668423820996E-11 -2.379929101708815E-11 -2.946486041364121E-13
node -9.91896847989974E-15 2.389664576145591E-14 2.809668423820996E-11 1.195858804650096E-8 -1.194206979085651E-8 -1.716774866929979E-10
peri 5.483510199779694E-14 -1.227252405554754E-13 -2.379929101708815E-11 -1.194206979085651E-8 1.193792270024657E-8 1.715364438981425E-10
i 8.203994108512637E-16 -1.813832275261841E-15 -2.946486041364121E-13 -1.716774866929979E-10 1.715364438981425E-10 1.699976433454097E-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. 2019-August); 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

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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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