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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 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 
[ show covariance matrix ]

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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