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187834 (1999 VM121)
Classification: Main-belt Asteroid          SPK-ID: 2187834
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1305824197929631 5.8347e-08  
a 3.14845915350913 3.3804e-08 au
q 2.737325738624603 1.8769e-07 au
i 5.18504009916204 6.389e-06 deg
node 32.57470506813987 6.016e-05 deg
peri 339.1589403550146 6.3705e-05 deg
M 338.4316200145728 2.3579e-05 deg
tp 2459518.753287731313
(2021-Oct-31.25328773)
0.00013483 TDB
period 2040.541923547767
5.59
3.2863e-05
8.997e-08
d
yr
n .176423721485756 2.8413e-09 deg/d
Q 3.559592568393656 3.8218e-08 au
  Orbit Determination Parameters
   # obs. used (total)      283  
   data-arc span      7921 days (21.69 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5876  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 15:23:52  

Additional Information
 Earth MOID = 1.73761 au 
 Jupiter MOID = 1.90576 au 
 T_jup = 3.189 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457308.5 (2015-Oct-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1339368337190947 5.7808e-08  
q 2.723607962319635 1.8617e-07 au
tp 2457488.535226445203
(2016-Apr-10.03522645)
0.00011792 TDB
node 32.8176531103712 6.0062e-05 deg
peri 340.3409000590968 6.3493e-05 deg
i 5.192492330494942 6.3946e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      283  
   data-arc span      7921 days (21.69 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5876  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 15:23:52  

Additional Information
 Jupiter MOID = 1.90576 au 
 T_jup = 3.189 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.341736965885921E-15 -1.064286449222273E-14 -3.069174011593947E-13 6.245440887538725E-15 -1.12844014515548E-14 -3.987135997860613E-15
q -1.064286449222273E-14 3.465783026855546E-14 2.206056295687584E-12 -1.826363930353151E-14 2.293536570532981E-13 1.344577879060634E-14
tp -3.069174011593947E-13 2.206056295687584E-12 1.390525277516947E-8 1.358595984933269E-11 2.461580000213299E-9 6.832622760985641E-12
node 6.245440887538725E-15 -1.826363930353151E-14 1.358595984933269E-11 3.607395287908564E-9 -3.58962239781093E-9 -4.904477234814284E-11
peri -1.12844014515548E-14 2.293536570532981E-13 2.461580000213299E-9 -3.58962239781093E-9 4.031319229050297E-9 5.002070754149514E-11
i -3.987135997860613E-15 1.344577879060634E-14 6.832622760985641E-12 -4.904477234814284E-11 5.002070754149514E-11 4.089150510300159E-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 15.83   n/a MPCxxxxx  
diameter diameter 3.569 km 0.443 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.4 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.066   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

187834 (1999 VM121)          Discovered 1999-Nov-04 by Spacewatch at Kitt Peak
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
1946-Dec-07 12:47 00:03 Jupiter 1.95957399316317 1.95957325961339 1.95957472671283 2.8476500336793 2.69158208694919 2432162.032300168 3.21190077147885 82.0300513037024 24.4136242329649 85.6636927990331 2017250.49370104 T 14 CATAB v2.0g-lin.ifort 2021-Jul-09 15:23:53 2021-Jul-09 15:23
1957-Jun-30 08:41 00:03 Jupiter 1.93488320061214 1.93488263239518 1.93488376882931 2.73088705716008 2.56558293709519 2436019.861805164 2.64527119079785 160.329555991193 17.5739450929026 87.9562942149189 2197862.52598274 T 14 CATAB v2.0g-lin.ifort 2021-Jul-09 15:23:53 2021-Jul-09 15:23
2042-Jan-17 21:01 00:01 Jupiter 1.96161484832836 1.961614323133 1.96161537352371 2.84067434113814 2.68436837024759 2466902.375732944 1.27606657852236 74.6568603700874 13.3368548026157 81.3259410015157 2454864.92083807 T 14 CATAB v2.0g-lin.ifort 2021-Jul-09 15:23:53 2021-Jul-09 15:23
2052-Aug-09 13:51 00:02 Jupiter 1.92919197251753 1.9291914017279 1.92919254330728 2.72913362957245 2.56321267103717 2470759.076954910 1.81188826269552 116.544978061869 16.5110565706995 85.2759584954996 2182011.72619872 T 14 CATAB v2.0g-lin.ifort 2021-Jul-09 15:23:53 2021-Jul-09 15:23
2137-Mar-01 22:14 00:06 Jupiter 1.96455131072888 1.96455057989052 1.96455204156713 2.83725441611847 2.6809897978465 2501643.426080023 5.77685621273466 71.3175367415855 18.724421352584 78.6952012216406 1893167.53015304 T 14 CATAB v2.0g-lin.ifort 2021-Jul-09 15:23:53 2021-Jul-09 15:23
2147-Sep-21 15:45 00:06 Jupiter 1.928582296366 1.92858167443148 1.92858291830414 2.72885975821256 2.56286691316598 2505499.156107400 6.24335838868997 272.919972542248 16.7487434744981 87.4215532584114 2175550.57093097 T 14 CATAB v2.0g-lin.ifort 2021-Jul-09 15:23:53 2021-Jul-09 15:23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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