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21385 (1998 FV8)
Classification: Main-belt Asteroid          SPK-ID: 2021385
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1620953095800816 3.6168e-08  
a 2.400010970686039 1.0672e-08 au
q 2.010980449397093 8.9799e-08 au
i 2.383066075040696 3.9196e-06 deg
node 81.73614160797425 0.00010914 deg
peri 185.1445310501971 0.00011041 deg
M 39.36473431080973 2.0464e-05 deg
tp 2459248.001149789585
(2021-Feb-02.50114979)
7.6625e-05 TDB
period 1358.057840646198
3.72
9.0578e-06
2.48e-08
d
yr
n .2650844383982223 1.768e-09 deg/d
Q 2.789041491974984 1.2401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1126  
   data-arc span      10952 days (29.98 yr)  
   first obs. used      1991-07-13  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55684  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:03:55  

Additional Information
 Earth MOID = .995005 au 
 Jupiter MOID = 2.28975 au 
 T_jup = 3.507 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456942.5 (2014-Oct-12.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1624371457768769 3.6136e-08  
q 2.009101916438847 8.9665e-08 au
tp 2456532.705722424368
(2013-Aug-28.20572242)
6.739e-05 TDB
node 81.77718989466456 0.00010909 deg
peri 185.0160148992953 0.00011036 deg
i 2.383859433437312 3.9211e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1126  
   data-arc span      10952 days (29.98 yr)  
   first obs. used      1991-07-13  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55684  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:03:55  

Additional Information
 Jupiter MOID = 2.28975 au 
 T_jup = 3.507 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.305799341761589E-15 -3.22519607282106E-15 -4.407233505241745E-13 1.264584636495835E-15 -9.89574513623952E-14 1.306496789174601E-16
q -3.22519607282106E-15 8.039792333991465E-15 1.290638387863453E-12 -4.441159458087653E-15 2.963906416914243E-13 -1.93129129518794E-16
tp -4.407233505241745E-13 1.290638387863453E-12 4.541367096583853E-9 -2.012888969664029E-11 1.14584890306165E-9 6.643259278967153E-13
node 1.264584636495835E-15 -4.441159458087653E-15 -2.012888969664029E-11 1.190123911286138E-8 -1.189551837386002E-8 -1.178218280285905E-11
peri -9.89574513623952E-14 2.963906416914243E-13 1.14584890306165E-9 -1.189551837386002E-8 1.217823840531041E-8 1.193847390777852E-11
i 1.306496789174601E-16 -1.93129129518794E-16 6.643259278967153E-13 -1.178218280285905E-11 1.193847390777852E-11 1.53750839550807E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.53   n/a E2021B10  
diameter diameter 1.910 km 0.327 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.232   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21385 (1998 FV8)          Discovered 1998-Mar-22 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FV8 = 1991 NF9 = 1994 CG20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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