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4086 Podalirius (1985 VK2)
Classification: Jupiter Trojan          SPK-ID: 2004086
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216208439841391 3.0528e-08  
a 5.264683576463312 7.9766e-08 au
q 4.624388316584408 2.0861e-07 au
i 21.69377346277632 1.8691e-06 deg
node 54.96657508596316 1.2485e-06 deg
peri 356.5745499292271 9.2647e-06 deg
M 336.504561372939 1.1299e-05 deg
tp 2459488.463798746558
(2021-Sep-30.96379875)
0.00013949 TDB
period 4412.216736799364
12.08
0.00010028
2.746e-07
d
yr
n .08159164009271791 1.8543e-09 deg/d
Q 5.904978836342217 8.9468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1998  
   data-arc span      23658 days (64.77 yr)  
   first obs. used      1956-05-13  
   last obs. used      2021-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:55:28  

Additional Information
 Earth MOID = 3.63501 au 
 Jupiter MOID = .381586 au 
 T_jup = 2.844 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457314.5 (2015-Oct-19.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1208404176026201 3.0489e-08  
q 4.620314552674567 2.0782e-07 au
tp 2459493.897068558274
(2021-Oct-06.39706856)
0.00014034 TDB
node 54.97871990822085 1.2482e-06 deg
peri 357.0936620397794 9.3189e-06 deg
i 21.71122297897888 1.8707e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1998  
   data-arc span      23658 days (64.77 yr)  
   first obs. used      1956-05-13  
   last obs. used      2021-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:55:28  

Additional Information
 Jupiter MOID = .381586 au 
 T_jup = 2.844 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.295949687785626E-16 -6.085957568034919E-15 -1.50509694707085E-12 -1.057190600064452E-15 -5.102236440603794E-14 2.622120216711113E-14
q -6.085957568034919E-15 4.318818611893099E-14 9.794466841886047E-12 7.426417666156751E-15 1.652348169114026E-13 -1.462072436908785E-13
tp -1.50509694707085E-12 9.794466841886047E-12 1.969421807992678E-8 9.415322766503447E-12 1.216383589023852E-9 -6.18317382934525E-11
node -1.057190600064452E-15 7.426417666156751E-15 9.415322766503447E-12 1.557956293435561E-12 -7.182105986378834E-13 -8.053245329019764E-13
peri -5.102236440603794E-14 1.652348169114026E-13 1.216383589023852E-9 -7.182105986378834E-13 8.684195406528122E-11 -3.005215262156622E-12
i 2.622120216711113E-14 -1.462072436908785E-13 -6.18317382934525E-11 -8.053245329019764E-13 -3.005215262156622E-12 3.499598535711373E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.24   n/a MPCxxxxx IRAS observations used: 17
diameter diameter 85.495 km 0.408 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 10.43 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:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.050   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

4086 Podalirius (1985 VK2)          Discovered 1985-Nov-09 by Zhuravleva, L. V. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1985 VK2 = 1951 XE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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