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18539 (1996 XX30)
Classification: Main-belt Asteroid          SPK-ID: 2018539
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2107431989111308 3.4584e-08  
a 2.602646168243409 1.0682e-08 au
q 2.054156189113995 8.8147e-08 au
i 3.648312098875196 3.8377e-06 deg
node 241.1064438542123 6.7561e-05 deg
peri 184.777622874999 6.8368e-05 deg
M 237.8220662003165 1.2627e-05 deg
tp 2459520.988809483575
(2021-Nov-02.48880948)
5.5636e-05 TDB
period 1533.631856316206
4.20
9.4416e-06
2.585e-08
d
yr
n .2347369080247997 1.4451e-09 deg/d
Q 3.151136147372822 1.2933e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1437  
   data-arc span      14948 days (40.93 yr)  
   first obs. used      1979-11-14  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51647  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:14:23  

Additional Information
 Earth MOID = 1.06788 au 
 Jupiter MOID = 2.16682 au 
 T_jup = 3.379 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456924.5 (2014-Sep-24.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2137333585284572 3.4804e-08  
q 2.042480428398336 8.9069e-08 au
tp 2456458.443503493198
(2013-Jun-14.94350349)
4.6139e-05 TDB
node 241.1729728038528 6.7393e-05 deg
peri 184.560163602445 6.817e-05 deg
i 3.655439583486281 3.8446e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1437  
   data-arc span      14948 days (40.93 yr)  
   first obs. used      1979-11-14  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51647  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:14:23  

Additional Information
 Jupiter MOID = 2.16682 au 
 T_jup = 3.379 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.211342151676933E-15 -3.087670208867575E-15 4.590023186698554E-13 5.192805827103029E-15 8.128159867713143E-14 -6.784237181952574E-16
q -3.087670208867575E-15 7.933364093385478E-15 -1.084820092850858E-12 -1.348560185314264E-14 -1.837150829245388E-13 1.798097491547954E-15
tp 4.590023186698554E-13 -1.084820092850858E-12 2.12885247620254E-9 8.778455923743601E-12 4.94579718600765E-10 -1.10712180721854E-12
node 5.192805827103029E-15 -1.348560185314264E-14 8.778455923743601E-12 4.541773003489765E-9 -4.530441354293597E-9 3.415559227972164E-11
peri 8.128159867713143E-14 -1.837150829245388E-13 4.94579718600765E-10 -4.530441354293597E-9 4.647117101785949E-9 -3.431929409527249E-11
i -6.784237181952574E-16 1.798097491547954E-15 -1.10712180721854E-12 3.415559227972164E-11 -3.431929409527249E-11 1.478107754065487E-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 14.3   n/a MPO384913  
diameter diameter 3.626 km 0.986 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.308   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18539 (1996 XX30)          Discovered 1996-Dec-14 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 XX30 = 1979 VN3 = 1991 PH17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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