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181856 (1998 XV3)
Classification: Main-belt Asteroid          SPK-ID: 2181856
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2683165409413782 8.1111e-08  
a 2.538980868383285 1.0949e-08 au
q 1.857730304262346 2.1153e-07 au
i 3.301491799643815 3.481e-06 deg
node 277.8329414544834 9.9255e-05 deg
peri 118.3319810774382 9.9549e-05 deg
M 230.7834794338715 9.9619e-06 deg
tp 2459926.899506433483
(2022-Dec-13.39950643)
4.3717e-05 TDB
period 1477.704410237043
4.05
9.5583e-06
2.617e-08
d
yr
n .2436211176646967 1.5758e-09 deg/d
Q 3.220231432504225 1.3886e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1125  
   data-arc span      8222 days (22.51 yr)  
   first obs. used      1998-12-09  
   last obs. used      2021-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50343  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 09:31:04  

Additional Information
 Earth MOID = .867021 au 
 Jupiter MOID = 2.23085 au 
 T_jup = 3.393 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457261.5 (2015-Aug-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2655564427059686 8.0575e-08  
q 1.867198156486336 2.0956e-07 au
tp 2456968.665350643563
(2014-Nov-07.16535064)
3.1215e-05 TDB
node 278.128689313541 9.9237e-05 deg
peri 118.0175458710824 9.9558e-05 deg
i 3.299548265368625 3.4715e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1125  
   data-arc span      8222 days (22.51 yr)  
   first obs. used      1998-12-09  
   last obs. used      2021-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50343  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 09:31:04  

Additional Information
 Jupiter MOID = 2.23085 au 
 T_jup = 3.393 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.492338675027601E-15 -1.687851799080657E-14 -1.617134488138748E-12 -1.365204820658082E-13 -4.893893079438326E-13 -9.187765470825134E-15
q -1.687851799080657E-14 4.391439933864144E-14 4.239730430003836E-12 3.587713198043034E-13 1.279002804086241E-12 2.395266981951646E-14
tp -1.617134488138748E-12 4.239730430003836E-12 9.743538476188831E-10 3.66578894397542E-11 2.986790414374289E-10 2.458152391159066E-12
node -1.365204820658082E-13 3.587713198043034E-13 3.66578894397542E-11 9.847996162205786E-9 -9.817270647103757E-9 -1.060877556959537E-10
peri -4.893893079438326E-13 1.279002804086241E-12 2.986790414374289E-10 -9.817270647103757E-9 9.911723075649054E-9 1.068532548265189E-10
i -9.187765470825134E-15 2.395266981951646E-14 2.458152391159066E-12 -1.060877556959537E-10 1.068532548265189E-10 1.20512827707161E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO459829  
diameter diameter 1.735 km 0.330 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 43.703 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 0.406   0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181856 (1998 XV3)          Discovered 1998-Dec-09 by Kobayashi, T. at Oizumi
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1998 XV3 = 2002 TW292 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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