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13960 (1991 GF8)
Classification: Main-belt Asteroid          SPK-ID: 2013960
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1177609022468251 3.956e-08  
a 2.776370751772523 1.3771e-08 au
q 2.449422827072095 1.0941e-07 au
i 9.078090539592345 4.3224e-06 deg
node 7.616053946358296 2.6787e-05 deg
peri 106.9106346664192 3.2036e-05 deg
M 188.8214997169154 1.753e-05 deg
tp 2459803.954586287855
(2022-Aug-12.45458629)
8.3373e-05 TDB
period 1689.719506744681
4.63
1.2572e-05
3.442e-08
d
yr
n .2130531124029904 1.5852e-09 deg/d
Q 3.103318676472952 1.5393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1980  
   data-arc span      10777 days (29.51 yr)  
   first obs. used      1991-04-08  
   last obs. used      2020-10-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:43:00  

Additional Information
 Earth MOID = 1.48405 au 
 Jupiter MOID = 2.00937 au 
 T_jup = 3.307 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456942.5 (2014-Oct-12.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1182962806176277 3.917e-08  
q 2.445273464411637 1.0814e-07 au
tp 2456420.505874547878
(2013-May-08.00587455)
8.0649e-05 TDB
node 7.876491226206899 2.6764e-05 deg
peri 105.3611147549488 3.2083e-05 deg
i 9.086403066674331 4.323e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1980  
   data-arc span      10777 days (29.51 yr)  
   first obs. used      1991-04-08  
   last obs. used      2020-10-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:43:00  

Additional Information
 Jupiter MOID = 2.00937 au 
 T_jup = 3.307 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.534323679342858E-15 -4.211055289711354E-15 5.13245484824338E-13 -1.359583599706185E-15 1.230948865827893E-13 -2.427702260241944E-15
q -4.211055289711354E-15 1.169363085016677E-14 -1.434482731319146E-12 4.971193598207477E-15 -3.355007186063417E-13 6.860567991295507E-15
tp 5.13245484824338E-13 -1.434482731319146E-12 6.504224677372483E-9 4.891398774511442E-12 1.446587044630487E-9 -2.180412077933142E-12
node -1.359583599706185E-15 4.971193598207477E-15 4.891398774511442E-12 7.163068111755467E-10 -7.05778619962664E-10 -1.753961967919603E-11
peri 1.230948865827893E-13 -3.355007186063417E-13 1.446587044630487E-9 -7.05778619962664E-10 1.029300281280096E-9 1.687480042385719E-11
i -2.427702260241944E-15 6.860567991295507E-15 -2.180412077933142E-12 -1.753961967919603E-11 1.687480042385719E-11 1.868810667914457E-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 13.7   n/a MPO344416  
rotation period rot_per 17.212 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

13960 (1991 GF8)          Discovered 1991-Apr-08 by Elst, E. W. at La Silla
Reference: 20000320/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
1972-Sep-09 16:37 00:03 Amphi 0.0386220415600433 0.03862031154239 0.0386237722061632 1.6682650267111 1.66826493748893 2441570.192405791 3.3358058595788 293.080733905562 41.8332276046567 75.0223802365577 133129.853653796 T 26 CATAB v2.0f-lin.ifort 2020-Nov-13 02:43:04 2020-Nov-13 02:43
2148-Mar-30 10:46 00:17 Amphi 0.0340692458274886 0.0340524848501053 0.0340860110681758 1.55255899057693 1.55255888189372 2505689.948351334 17.0632948711048 1025.15388153445 40.2349928241638 35.7437091758643 73856.7227053494 T 26 CATAB v2.0f-lin.ifort 2020-Nov-13 02:43:04 2020-Nov-13 02:43

Alternate Designations
 1991 GF8 = 1999 AF23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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