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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1340317446702022 2.7239e-08  
a 2.64908209405395 1.0265e-08 au
q 2.294020999213306 7.0158e-08 au
i 13.54735060116434 4.2253e-06 deg
node 132.1565025465235 1.2596e-05 deg
peri 112.8834150854178 2.1249e-05 deg
M 36.15480225719192 1.5962e-05 deg
tp 2458842.336945960768
(2019-Dec-24.83694596)
6.9804e-05 TDB
period 1574.85854988454
4.31
9.1533e-06
2.506e-08
d
yr
n .2285919583231099 1.3286e-09 deg/d
Q 3.004143188894593 1.164e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2286  
   data-arc span      15782 days (43.21 yr)  
   first obs. used      1977-08-06  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44078  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-26 08:57:13  

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

[ hide close-approach data ]
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 31 CATAB v2.0f-lin.ifort 2020-Oct-26 08:59:10 2020-Oct-26 08:59
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 31 CATAB v2.0f-lin.ifort 2020-Oct-26 08:59:10 2020-Oct-26 08:59

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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