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187961 (2001 PL2)
Classification: Main-belt Asteroid          SPK-ID: 2187961
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1402307460620069 4.3338e-08  
a 2.41203161253584 8.6471e-09 au
q 2.073790619984793 1.0407e-07 au
i 5.202568433682906 3.1583e-06 deg
node 270.4587603367355 6.5066e-05 deg
peri 52.34375416235491 6.7632e-05 deg
M 60.38357004708975 1.8389e-05 deg
tp 2458970.996556867234
(2020-May-01.49655687)
6.9802e-05 TDB
period 1368.273513198444
3.75
7.3579e-06
2.014e-08
d
yr
n .2631052903731744 1.4148e-09 deg/d
Q 2.750272605086886 9.8597e-09 au
  Orbit Determination Parameters
   # obs. used (total)      631  
   data-arc span      22023 days (60.30 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53083  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:57:31  

Additional Information
 Earth MOID = 1.064 au 
 Jupiter MOID = 2.54167 au 
 T_jup = 3.500 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457859.5 (2017-Apr-16.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1406008834593498 4.3423e-08  
q 2.073247157720653 1.0444e-07 au
tp 2457603.912376417803
(2016-Aug-03.41237642)
6.9582e-05 TDB
node 270.4670265801494 6.5086e-05 deg
peri 52.72869926732674 6.7631e-05 deg
i 5.201509702409843 3.159e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      631  
   data-arc span      22023 days (60.30 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53083  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:57:31  

Additional Information
 Jupiter MOID = 2.54167 au 
 T_jup = 3.500 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.88557629483669E-15 -4.523555125684769E-15 1.878760556378214E-12 1.106052516099932E-14 4.794054677917098E-13 -3.953157017925946E-15
q -4.523555125684769E-15 1.090729255602827E-14 -4.565910859881456E-12 -2.870092480226562E-14 -1.161172241382178E-12 9.646831588052498E-15
tp 1.878760556378214E-12 -4.565910859881456E-12 4.841665785373072E-9 9.681455192054267E-12 1.324202277369978E-9 -6.689817182035238E-12
node 1.106052516099932E-14 -2.870092480226562E-14 9.681455192054267E-12 4.236181385028474E-9 -4.216984729441531E-9 -4.491449128599875E-11
peri 4.794054677917098E-13 -1.161172241382178E-12 1.324202277369978E-9 -4.216984729441531E-9 4.573962850319781E-9 4.29642372853128E-11
i -3.953157017925946E-15 9.646831588052498E-15 -6.689817182035238E-12 -4.491449128599875E-11 4.29642372853128E-11 9.979440333896355E-12

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 16.36   n/a E2021B55  

187961 (2001 PL2)          Discovered 2001-Aug-03 by NEAT at Haleakala
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

[ 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
2061-Aug-30 18:10 00:01 Iris 0.0429796793463248 0.0429691521918253 0.0429902073772546 4.63572947316471 4.63572944431165 2474067.256770636 1.21161272139098 608.266517258742 57.0479074855058 -30.5341113026659 57955.0393585554 T 19 CATAB v2.0f-lin.ifort 2021-Apr-13 21:57:33 2021-Apr-13 21:57
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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