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821 Fanny (A916 GH)
Classification: Main-belt Asteroid          SPK-ID: 2000821
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2123005712718636 3.3828e-08  
a 2.771795219542949 8.813e-09 au
q 2.18334151098536 9.3593e-08 au
i 5.398941909371398 4.2386e-06 deg
node 209.7564230363388 3.3677e-05 deg
peri 32.86200236422739 3.4773e-05 deg
M 150.4145284664826 9.5814e-06 deg
tp 2458296.249077084553
(2018-Jun-26.74907708)
4.3769e-05 TDB
period 1685.544174717511
4.61
8.0388e-06
2.201e-08
d
yr
n .2135808751855075 1.0186e-09 deg/d
Q 3.360248928100537 1.0684e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3158  
   data-arc span      37928 days (103.84 yr)  
   first obs. used      1916-04-01  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44988  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:37:55  

Additional Information
 Earth MOID = 1.1731 au 
 Jupiter MOID = 1.6627 au 
 T_jup = 3.297 
[ 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 11.8   n/a MPO502161  
diameter diameter 28.856 km 0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 236.6 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2018) Minor Planet Bull. 45, 356-359.]
[Polakis, T. (2018) Minor Planet Bull. 45, 347-352.]
geometric albedo albedo 0.025   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.706   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.47 deg.
U-B UB 0.321   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.47 deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

821 Fanny (A916 GH)          Discovered 1916-Mar-31 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
1904-May-31 11:21 00:02 Jupiter 1.87300490944688 1.87300378763096 1.87300603126323 2.26545305605051 2.05616742603731 2416631.972942572 1.70289394097287 91.3531235916568 20.0768300124229 -75.2032717647624 2054593.48361783 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:38:08 2020-Feb-22 15:38
1965-Apr-08 13:02 < 00:01 Jupiter 1.69633320210876 1.69633278402929 1.69633362018881 1.69988313427011 1.37511874479869 2438859.043120683 0.737783722059651 147.89361038188 47.0337819384414 -64.6668481480597 3532597.51120971 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:38:08 2020-Feb-22 15:38
1987-Nov-24 10:26 < 00:01 Jupiter 1.75276859014312 1.75276821873471 1.75276896155132 1.99105387625573 1.73141527466396 2447123.934660525 0.390000288310822 51.636477899353 33.2757343097127 -61.0929970663625 2182709.70276998 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:38:08 2020-Feb-22 15:38
2048-Sep-26 21:30 < 00:01 Jupiter 1.78565563459961 1.78565527716131 1.78565599203802 1.67228670402134 1.35935515711102 2469346.395497432 0.541510951739838 130.488826573786 40.2774174032274 -65.1594067870577 3610734.96200843 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:38:08 2020-Feb-22 15:38
2071-May-14 18:59 < 00:01 Jupiter 1.6753429689641 1.67534254756023 1.67534339036778 1.82071928963241 1.51784571246036 2477611.291118518 0.880041511523888 97.7903489093992 46.5155538535597 -62.589680528176 1916242.40594354 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:38:08 2020-Feb-22 15:38
2132-Mar-25 05:57 00:02 Jupiter 1.928003432292 1.92800213564893 1.92800472893397 1.80382708459866 1.54114880958864 2499840.748215280 1.89236595283098 76.0684557969632 29.588080449539 -77.2732247758945 1415604.38748814 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:38:08 2020-Feb-22 15:38
2154-Oct-31 05:59 00:02 Jupiter 1.66698565392793 1.66698534660766 1.66698596124906 1.70006221731196 1.3689335348722 2508095.749385939 2.09325718109413 182.915561709513 90.2549010645731 -86.5367543467306 1759604.04992781 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:38:08 2020-Feb-22 15:38
2177-Jun-11 06:52 00:03 Jupiter 1.85997697103407 1.85997523741827 1.85997870465156 2.30406539939261 2.09712402812532 2516354.786225766 2.60787023637822 140.11328517709 18.9845047579808 -74.8937806381866 1955166.72704243 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:38:08 2020-Feb-22 15:38

Alternate Designations
 A916 GH = 1930 HC = 1930 HO = 1930 HT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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