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17977 (1999 JR54)
Classification: Main-belt Asteroid          SPK-ID: 2017977
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2444249881794968 4.0517e-08  
a 2.662166212769049 1.1387e-08 au
q 2.011466267681118 1.0867e-07 au
i 12.94111858981561 4.3835e-06 deg
node 34.0491606526905 1.6813e-05 deg
peri 308.5631159869957 1.799e-05 deg
M 225.8485354715822 8.2917e-06 deg
tp 2459591.713163501325
(2022-Jan-12.21316350)
3.8423e-05 TDB
period 1586.540554057023
4.34
1.018e-05
2.787e-08
d
yr
n .2269087916343681 1.4559e-09 deg/d
Q 3.31286615785698 1.4171e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1650  
   data-arc span      10457 days (28.63 yr)  
   first obs. used      1991-09-12  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51261  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:43:27  

Additional Information
 Earth MOID = 1.03313 au 
 Jupiter MOID = 2.21181 au 
 T_jup = 3.306 
[ 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 14.1   n/a MPO467902  
diameter diameter 6.095 km 0.203 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.157   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17977 (1999 JR54)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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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
2048-Sep-26 04:56 < 00:01 Amphi 0.0187972454064166 0.0187913445706544 0.0188031463322355 5.30300798139652 5.30300792372565 2469345.705522643 0.676394781083765 301.368419472759 41.6019920723052 -12.6763863655298 17396.5606704683 T 32 CATAB v2.0f-lin.ifort 2020-May-20 04:43:42 2020-May-20 04:43
2094-Dec-02 03:56 < 00:01 Hygie 0.0283068388758991 0.0283009552614768 0.0283127266274755 6.26724957137879 6.26724935359073 2486213.663948416 0.515656923085283 618.366925202444 40.168125398791 61.9113641357324 92989.8856566627 T 32 CATAB v2.0f-lin.ifort 2020-May-20 04:43:42 2020-May-20 04:43

Alternate Designations
 1999 JR54 = 1991 RT24 = 1998 FC87 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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