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840 Zenobia (A916 SN)
Classification: Main-belt Asteroid          SPK-ID: 2000840
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1010108558542286 3.8234e-08  
a 3.130261690067068 1.3202e-08 au
q 2.814071277705689 1.249e-07 au
i 9.989236894247867 4.22e-06 deg
node 272.7644523210034 2.4674e-05 deg
peri 10.40699775263993 3.3036e-05 deg
M 322.1628636207773 2.2397e-05 deg
tp 2459213.110718729196
(2020-Dec-29.61071873)
0.00012612 TDB
period 2022.876625106879
5.54
1.2798e-05
3.504e-08
d
yr
n .1779643877099916 1.1259e-09 deg/d
Q 3.446452102428446 1.4536e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2747  
   data-arc span      38019 days (104.09 yr)  
   first obs. used      1916-09-25  
   last obs. used      2020-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41156  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:25:15  

Additional Information
 Earth MOID = 1.79826 au 
 Jupiter MOID = 1.69381 au 
 T_jup = 3.182 
[ 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 10.1   n/a MPO394997  
diameter diameter 27.306 km 0.256 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.565 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.232   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

840 Zenobia (A916 SN)          Discovered 1916-Sep-25 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
1907-Mar-15 01:32 00:02 Jupiter 1.79322929602919 1.79322849680125 1.79323009525897 3.63107163708589 3.49856994399588 2417649.563908923 1.99910585515887 148.181076716745 30.8255027719105 80.6704882349761 4111292.39809152 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
1917-Aug-02 00:39 00:02 Jupiter 1.74901064061362 1.74900991782447 1.74901136340536 3.13221828514791 2.97358673528487 2421442.527202730 1.92430566301284 138.283594495841 17.681445968552 -75.3475980010845 2822908.56101047 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
1990-Jul-28 08:35 < 00:01 Jupiter 1.85885591657374 1.85885548654917 1.85885634659832 3.61723871824724 3.48899390708212 2448100.857588536 0.486054470510446 109.833171008768 19.9935859093624 -89.2374138115764 4150032.68905148 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
2000-Dec-22 16:01 < 00:01 Jupiter 1.70842549131819 1.70842506417676 1.70842591845972 3.33437794903982 3.18221521632751 2451901.167279136 0.302065399785647 59.4739716576421 16.0136874593509 -77.6837295542699 3164743.03921996 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
2011-Mar-27 05:25 < 00:01 Jupiter 1.98193545056319 1.98193498765035 1.98193591347615 3.13353794091125 2.99404696684122 2455647.725518960 0.242024703106471 35.109263264346 12.7800493168152 -64.7514399615655 3555981.5650631 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
2073-Dec-13 19:33 00:01 Jupiter 1.95233848660413 1.95233769991543 1.95233927329295 3.57008398403241 3.44641831157162 2478555.314343529 1.15359900407645 119.74867133487 36.1293145961301 -84.7335294133559 3453613.64602321 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
2084-May-10 14:14 00:01 Jupiter 1.70054120774271 1.70054080967107 1.70054160581434 3.48252531690921 3.33643562006535 2482356.093046649 1.36322000070415 134.648191258884 17.9155043512721 -89.0925433564185 3530775.26905156 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
2094-Aug-30 18:39 00:02 Jupiter 1.91935587019573 1.91935506961661 1.91935667077561 3.08724394605101 2.94082708767613 2486120.277217802 1.79391635221099 86.6550659751952 16.4805797424728 -66.5573073468285 3226562.62037877 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
2167-Sep-25 13:38 00:03 Jupiter 1.71274409321021 1.71274341146899 1.71274477495893 3.54260442065817 3.40014171545349 2512808.067925626 2.89336980062094 244.916809018304 21.8053298533143 84.671127786077 3666074.56020612 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25
2178-Feb-01 17:28 00:03 Jupiter 1.8475853849042 1.8475840061344 1.84758676368009 3.19948356817728 3.05283447876563 2516590.228001158 3.46714364485283 193.442530756041 18.1575237618971 -68.6443597311217 3098315.50306229 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:23 2020-Nov-13 04:25

Alternate Designations
 A916 SN = 1937 LR = 1942 HE = 1943 OF = 1952 BM1 = 1956 YA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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