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19918 (1977 PB)
Classification: Main-belt Asteroid          SPK-ID: 2019918
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1340317455256146 2.723e-08  
a 2.649082093865978 1.0263e-08 au
q 2.294020996784471 7.0129e-08 au
i 13.54735056240241 4.2248e-06 deg
node 132.156502813923 1.2587e-05 deg
peri 112.8834148084035 2.1242e-05 deg
M 36.1548023822571 1.5962e-05 deg
tp 2458842.336945430491
(2019-Dec-24.83694543)
6.9803e-05 TDB
period 1574.858549716917
4.31
9.1521e-06
2.506e-08
d
yr
n .2285919583474404 1.3284e-09 deg/d
Q 3.004143190947484 1.1639e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2294  
   data-arc span      15790 days (43.23 yr)  
   first obs. used      1977-08-06  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44186  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:05:51  

Additional Information
 Earth MOID = 1.31831 au 
 Jupiter MOID = 2.1791 au 
 T_jup = 3.339 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457625.5 (2016-Aug-25.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329330917540302 2.7285e-08  
q 2.296393086875149 7.0092e-08 au
tp 2457267.603041654196
(2015-Sep-02.10304165)
7.0697e-05 TDB
node 132.1920273229328 1.2596e-05 deg
peri 112.7199524259389 2.1349e-05 deg
i 13.54241003972995 4.2233e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2294  
   data-arc span      15790 days (43.23 yr)  
   first obs. used      1977-08-06  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44186  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:05:51  

Additional Information
 Jupiter MOID = 2.1791 au 
 T_jup = 3.339 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.444895114121111E-16 -1.898351268843497E-15 1.726016906590382E-13 -1.060368809687521E-15 3.538705569100129E-14 -7.732741633528601E-16
q -1.898351268843497E-15 4.912824664820273E-15 -5.20394922364629E-13 2.223642684520012E-15 -1.041978134138734E-13 1.770586356949748E-15
tp 1.726016906590382E-13 -5.20394922364629E-13 4.99807889199068E-9 -1.735664354210944E-11 1.22442263999282E-9 3.995116382928153E-12
node -1.060368809687521E-15 2.223642684520012E-15 -1.735664354210944E-11 1.586596287056859E-10 -1.581350431161767E-10 3.861901259803774E-12
peri 3.538705569100129E-14 -1.041978134138734E-13 1.22442263999282E-9 -1.581350431161767E-10 4.557626178914955E-10 -2.847706135523996E-12
i -7.732741633528601E-16 1.770586356949748E-15 3.995116382928153E-12 3.861901259803774E-12 -2.847706135523996E-12 1.783657169280632E-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 13.1   n/a MPO474028  
diameter diameter 7.546 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.6897 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Clark, M. (2016) Minor Planet Bull. 43, 2-5.]
geometric albedo albedo 0.200   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

19918 (1977 PB)          Discovered 1977-Aug-06 by Lagerkvist, C.-I. at Mount Stromlo
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1977 PB = 1990 KE2 = 1990 SO18 = 1998 KV60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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