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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457461.5 (2016-Mar-14.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1328601429128326 2.8356e-08  
q 2.296331691786409 7.351e-08 au
tp 2457267.473486357481
(2015-Sep-01.97348636)
7.1468e-05 TDB
node 132.1926670549329 1.3816e-05 deg
peri 112.6842307408242 2.2252e-05 deg
i 13.54310668056768 4.2312e-06 deg
  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
 Jupiter MOID = 2.1791 au 
 T_jup = 3.339 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.040842858847404E-16 -2.069348592356315E-15 9.735006856019408E-14 -1.703269451781462E-15 2.334680924530241E-14 -8.847460115232445E-16
q -2.069348592356315E-15 5.403707006757724E-15 -3.037518977020124E-13 3.703876465285039E-15 -6.913657526377324E-14 2.115755064075603E-15
tp 9.735006856019408E-14 -3.037518977020124E-13 5.107684698188078E-9 -2.928225849326607E-11 1.255590005344198E-9 4.497170619288399E-12
node -1.703269451781462E-15 3.703876465285039E-15 -2.928225849326607E-11 1.908700718591998E-10 -1.92221700942383E-10 3.591545673644726E-12
peri 2.334680924530241E-14 -6.913657526377324E-14 1.255590005344198E-9 -1.92221700942383E-10 4.951716637899961E-10 -2.476164118574817E-12
i -8.847460115232445E-16 2.115755064075603E-15 4.497170619288399E-12 3.591545673644726E-12 -2.476164118574817E-12 1.790266468545767E-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

[ 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 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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