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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1340317426798679 3.3536e-08  
a 2.649082094607808 1.165e-08 au
q 2.294021004965489 9.0138e-08 au
i 13.54734980660336 4.3244e-06 deg
node 132.15649178316 1.6924e-05 deg
peri 112.8834260245501 2.4585e-05 deg
M 36.15480152994489 1.7886e-05 deg
tp 2458842.336949092586
(2019-Dec-24.83694909)		 7.8002e-05 TDB
period 1574.858550378436
4.31		 1.0388e-05
2.844e-08		 d
yr
n .2285919582514205 1.5079e-09 deg/d
Q 3.004143184250127 1.3211e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1965  
   data-arc span      15655 days (42.86 yr)  
   first obs. used      1977-08-06  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46637  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:37:13  

Additional Information
 Earth MOID = 1.31831 au 
 Jupiter MOID = 2.1791 au 
 T_jup = 3.339 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457175.5 (2015-Jun-02.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1327391769639548 3.3629e-08  
q 2.296314345896599 9.0124e-08 au
tp 2457267.310780553356
(2015-Sep-01.81078055)		 7.6887e-05 TDB
node 132.1924970449917 1.6935e-05 deg
peri 112.6369626933029 2.4694e-05 deg
i 13.54331222615649 4.3233e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1965  
   data-arc span      15655 days (42.86 yr)  
   first obs. used      1977-08-06  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46637  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:37:13  

Additional Information
 Jupiter MOID = 2.1791 au 
 T_jup = 3.339 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.130887759043267E-15 -3.011875695948944E-15 -4.113311658782478E-13 4.881201401910677E-15 -7.497025641061851E-14 -1.848993291230843E-15
q -3.011875695948944E-15 8.122264715573822E-15 1.167087449967964E-12 -1.482336037839705E-14 2.147180934135995E-13 4.946027718767651E-15
tp -4.113311658782478E-13 1.167087449967964E-12 5.911572097230586E-9 -2.556547671993795E-11 1.397957756592697E-9 7.442954375432387E-12
node 4.881201401910677E-15 -1.482336037839705E-14 -2.556547671993795E-11 2.867987826800688E-10 -2.841440078506526E-10 1.202637502343142E-11
peri -7.497025641061851E-14 2.147180934135995E-13 1.397957756592697E-9 -2.841440078506526E-10 6.098029062893782E-10 -1.007568542604654E-11
i -1.848993291230843E-15 4.946027718767651E-15 7.442954375432387E-12 1.202637502343142E-11 -1.007568542604654E-11 1.869060699859653E-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

[ show close-approach data ]
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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