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66187 (1998 XS73)
Classification: Outer Main-belt Asteroid          SPK-ID: 2066187
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1614997071547125 4.3636e-08  
a 3.984436882628467 4.0557e-08 au
q 3.340951492907534 1.7216e-07 au
i 7.67240346903364 5.3819e-06 deg
node 307.7025943923431 3.4187e-05 deg
peri 172.1975628379112 3.8168e-05 deg
M 278.3864099552618 1.9624e-05 deg
tp 2460055.080451674807
(2023-Apr-20.58045167)
0.00016556 TDB
period 2905.018177401158
7.95
4.4355e-05
1.214e-07
d
yr
n .1239234930784693 1.8921e-09 deg/d
Q 4.6279222723494 4.7107e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1690  
   data-arc span      11201 days (30.67 yr)  
   first obs. used      1990-12-09  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4572  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:32:59  

Additional Information
 Earth MOID = 2.35761 au 
 Jupiter MOID = .474188 au 
 T_jup = 3.018 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457537.5 (2016-May-29.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1574948581692442 4.5258e-08  
q 3.379707868873409 1.8412e-07 au
tp 2457155.378912622376
(2015-May-12.87891262)
0.00013952 TDB
node 308.0789209202059 3.4114e-05 deg
peri 173.6371244272218 3.8145e-05 deg
i 7.659972425502503 5.3837e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1690  
   data-arc span      11201 days (30.67 yr)  
   first obs. used      1990-12-09  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4572  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:32:59  

Additional Information
 Jupiter MOID = .474188 au 
 T_jup = 3.018 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.04828046135077E-15 -8.187436401686646E-15 2.331992027095576E-12 -8.73677438806288E-15 3.431642962496869E-13 -3.486068267849194E-16
q -8.187436401686646E-15 3.389872868462292E-14 -7.200147712040831E-12 3.532564244255531E-14 -1.110141682624272E-12 1.221375721303559E-15
tp 2.331992027095576E-12 -7.200147712040831E-12 1.94664857993763E-8 -1.709086768926168E-11 2.41900297628619E-9 3.11234642776832E-12
node -8.73677438806288E-15 3.532564244255531E-14 -1.709086768926168E-11 1.163762190133456E-9 -1.155908312242125E-9 8.70562209691699E-11
peri 3.431642962496869E-13 -1.110141682624272E-12 2.41900297628619E-9 -1.155908312242125E-9 1.455058408926754E-9 -8.594330081298873E-11
i -3.486068267849194E-16 1.221375721303559E-15 3.11234642776832E-12 8.70562209691699E-11 -8.594330081298873E-11 2.89838396966478E-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 12.19   n/a MPO636966  
diameter diameter 21.658 km 0.725 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 31.034 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.065   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

66187 (1998 XS73)          Discovered 1998-Dec-14 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 XS73 = 1996 SM8 = 1999 BW16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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