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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1341141096109573 1.3484e-08  
a 2.647707834323386 1.0008e-08 au
q 2.292612855613149 3.3299e-08 au
i 13.55066501191095 5.1725e-07 deg
node 132.1566154997386 2.5688e-06 deg
peri 112.6165166550013 6.0087e-06 deg
M 82.1234896844816 6.1776e-06 deg
tp 2458841.521521560572
(2019-Dec-24.02152156)
2.6265e-05 TDB
period 1573.63322886916
4.31
8.9224e-06
2.443e-08
d
yr
n .228769953122242 1.2971e-09 deg/d
Q 3.002802813033622 1.135e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2404  
   data-arc span      15863 days (43.43 yr)  
   first obs. used      1977-08-06  
   last obs. used      2021-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:29:03  

Additional Information
 Earth MOID = 1.31564 au 
 Jupiter MOID = 2.17877 au 
 T_jup = 3.340 
[ 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 13.00   n/a E2021B10  
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. 2020-October); 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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