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JPL Small-Body Database Browser
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764 Gedania (A913 SF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000764
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .094130635580236 3.9737e-08  
a 3.20131769101317 1.7449e-08 au
q 2.899975622063847 1.2437e-07 au
i 10.01753395413621 4.3562e-06 deg
node 258.9377648666953 2.4644e-05 deg
peri 156.6451529318543 3.3863e-05 deg
M 242.5813074578168 2.4371e-05 deg
tp 2459682.880060795336
(2022-Apr-13.38006080)
0.00014364 TDB
period 2092.144074914372
5.73
1.7105e-05
4.683e-08
d
yr
n .1720722794938175 1.4068e-09 deg/d
Q 3.502659759962494 1.9091e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3170  
   data-arc span      42667 days (116.82 yr)  
   first obs. used      1902-11-21  
   last obs. used      2019-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37845  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:36:25  

Additional Information
 Earth MOID = 1.91548 au 
 Jupiter MOID = 1.81509 au 
 T_jup = 3.163 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456002.5 (2012-Mar-16.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1003189045906641 4.0434e-08  
q 2.869422724576752 1.2826e-07 au
tp 2455505.299511594838
(2010-Nov-04.79951159)
0.00012351 TDB
node 259.0224997405028 2.4626e-05 deg
peri 155.3321839626639 3.263e-05 deg
i 10.033275456598 4.3659e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3170  
   data-arc span      42667 days (116.82 yr)  
   first obs. used      1902-11-21  
   last obs. used      2019-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37845  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:36:25  

Additional Information
 Jupiter MOID = 1.81509 au 
 T_jup = 3.163 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.63487748253739E-15 -5.153028307991303E-15 -2.075990806941787E-13 -2.129871593664046E-15 -6.114120175735915E-14 9.302939032404912E-16
q -5.153028307991303E-15 1.64493897556297E-14 9.822592987166738E-13 7.820864255781245E-15 2.538420261083285E-13 -1.900094421971285E-15
tp -2.075990806941787E-13 9.822592987166738E-13 1.525563554626609E-8 -6.531918776863973E-12 2.669585910265917E-9 -4.969858835664245E-13
node -2.129871593664046E-15 7.820864255781245E-15 -6.531918776863973E-12 6.064168485573104E-10 -5.979689687442808E-10 -9.086829444965588E-12
peri -6.114120175735915E-14 2.538420261083285E-13 2.669585910265917E-9 -5.979689687442808E-10 1.064712505799451E-9 9.017011929016062E-12
i 9.302939032404912E-16 -1.900094421971285E-15 -4.969858835664245E-13 -9.086829444965588E-12 9.017011929016062E-12 1.906083999866669E-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 9.6   n/a MPO435702  
diameter diameter 58.28 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
rotation period rot_per 24.9751 h n/a LCDB (Rev. 2019-August); 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]
[Brinsfield, J.W. (2010) Minor Planet Bull. 37, 19-20.]
geometric albedo albedo 0.0840   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
B-V BV 0.737   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.71, mean=1.84, max.=1.96) deg.
U-B UB 0.400   0.043 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.71, mean=1.84, max.=1.96) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

764 Gedania (A913 SF)          Discovered 1913-Sep-26 by Kaiser, F. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A913 SF = A902 WD = A908 YE = A918 TA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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