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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1340317485513503 2.8297e-08  
a 2.649082092959493 1.0475e-08 au
q 2.294020987984062 7.3559e-08 au
i 13.54735050638224 4.2324e-06 deg
node 132.1564992069808 1.3807e-05 deg
peri 112.8834173462404 2.2141e-05 deg
M 36.15480377494924 1.6203e-05 deg
tp 2458842.336939419193
(2019-Dec-24.83693942)
7.0826e-05 TDB
period 1574.858548908571
4.31
9.341e-06
2.557e-08
d
yr
n .2285919584647726 1.3558e-09 deg/d
Q 3.004143197934925 1.1879e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2107  
   data-arc span      15706 days (43.00 yr)  
   first obs. used      1977-08-06  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45323  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:31:08  

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1913-Jan-22 01:08 00:01 Amphi 0.0119120827790755 0.0119089758669764 0.0119152071189037 7.130193471928 7.13019340424431 2419789.547309497 1.20730788983613 761.843556468714 41.7666674113438 -78.6566529097893 41826.0210032406 T 30 CATAB v2.0f-lin.ifort 2020-Aug-25 01:31:21 2020-Aug-25 01:31
1990-Aug-13 02:18 < 00:01 Amphi 0.0166836052937203 0.0166805889642546 0.0166866216287499 7.02901394021264 7.0290138911909 2448116.595676028 0.410461420320886 151.212151179722 40.6410977268693 6.21726159455779 17700.9845311555 T 30 CATAB v2.0f-lin.ifort 2020-Aug-25 01:31:21 2020-Aug-25 01:31

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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