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3122 Florence (1981 ET3)
Classification: Amor [NEO, PHA]          SPK-ID: 2003122
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 282 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4227883799036792 6.7269e-08  
a 1.768293076178107 5.0772e-09 AU
q 1.020679311305872 1.1915e-07 AU
i 22.16262847693175 7.0467e-06 deg
node 336.1218188635835 1.1839e-05 deg
peri 27.7041851204819 1.3905e-05 deg
M 292.5171339096716 1.0655e-05 deg
tp 2457161.498123859244
(2015-May-18.99812386)
2.5769e-05 JED
period 858.8746736356341
2.35
3.6991e-06
1.013e-08
d
yr
n .4191531209974008 1.8052e-09 deg/d
Q 2.515906841050342 7.2238e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1592  
   data-arc span      12812 days (35.08 yr)  
   first obs. used      1979-03-09  
   last obs. used      2014-04-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49249  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 13:56:43  

Additional Information
 Earth MOID = .0453336 AU 
 T_jup = 3.921 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1 mag n/a MPO259359  
diameter diameter 4.9 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 2.3581 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) Icarus 136, 124-153.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2002) http://www.asu.cas.cz/~ppravec/neo.htm]
[Pravec, P.; Wolf, M.; Sarounova, L. (2003) http://www.asu.cas.cz/~ppravec/neo.htm]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Elenin, L.; Molotov, I. (2012) Minor Planet Bul. 39, 101-102.]
[Linder, T.; Sampson, R.; Holmes, R. (2013) Minor Planet Bul. 40, 4-6.]
SMASSII spectral type spec_B S   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)

3122 Florence (1981 ET3)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring (413)
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
1923-Aug-08 22:18 < 00:01 Earth 0.388074618479861 0.38807145502617 0.388077781931932 20.2912392441995 20.2909008739535 2423640.429326505 0.0662777157689733 151.027170120235 12.5440867837512 1.68463812532979 357111.874609986 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
1930-Aug-29 19:23 < 00:01 Earth 0.0523921881167554 0.052390916684847 0.0523934596069668 13.9543896153053 13.9507446642668 2426218.307839813 0.0751597473116528 87.8072427790635 13.6566057711264 -55.7767611682023 372479.415107296 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
1937-Sep-23 01:30 < 00:01 Earth 0.299783813723694 0.299781465757432 0.299786161687934 14.1610335769501 14.160405925049 2428799.562369136 0.071500753444802 101.016189272037 14.3243045346565 -6.11492289747447 434518.993162216 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
1970-Aug-18 03:36 < 00:01 Earth 0.223786904834132 0.22378429039785 0.223789519267895 16.8730127475762 16.8723070897963 2440816.649706240 0.0625363141507327 116.049472657962 12.6451562337325 -3.47706889818686 274867.195481045 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
1977-Sep-07 14:11 < 00:01 Earth 0.113707653742489 0.113705368396794 0.113709939094942 13.082101207097 13.0803098800279 2443394.091283473 0.08503551657007 92.3027653376596 13.424046108184 20.916419901908 368055.029104948 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
1984-Oct-08 08:01 < 00:01 Earth 0.451048384835996 0.451046477607676 0.45105029206466 16.7695851337333 16.7692328671334 2445981.834066532 0.0518291137589289 93.9567319044067 13.9988560025439 -11.8897272603597 1012906.53404983 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2010-Aug-11 12:57 < 00:01 Earth 0.338836110249923 0.338834934964181 0.338837285535404 19.2694047551354 19.2689966623013 2455420.039753152 0.0191732033849528 54.3137970558141 11.4135023196109 6.02612706056137 898858.674562868 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2017-Sep-01 12:06 < 00:01 Earth 0.047236721258817 0.0472362662371193 0.0472371762982792 13.5346237283327 13.5304554826914 2457998.004029359 0.0438240514564834 52.6525150953148 12.2331635641355 76.5586828410129 433960.903070795 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2024-Oct-01 03:49 < 00:01 Earth 0.381687419730604 0.381684177990001 0.38169066146892 15.3070728178915 15.3066167612001 2460584.659271395 0.0924320419714308 150.630997117205 13.1490562072226 -8.92451836789166 622707.786872537 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2050-Aug-11 02:01 < 00:01 Earth 0.348112723776293 0.348102455021235 0.348122992508972 19.5125726112419 19.5121803437736 2470029.583883450 0.19907653316472 482.502477225291 11.9041453895389 0.965338488432024 113178.962404229 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2057-Sep-02 00:41 < 00:01 Earth 0.0499572968125344 0.0499516565244635 0.0499629391952469 13.4723750108786 13.4684155770834 2472608.528368100 0.389672081299336 444.737271850984 12.2384419937192 61.5646168024478 413377.276726004 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2064-Oct-05 16:50 < 00:01 Earth 0.416618797644135 0.416597434734406 0.416640160534216 15.9545808725887 15.954180011823 2475199.201604211 0.506585405165528 1033.66892537539 13.2307319527917 -13.2439060856738 885594.809204974 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2090-Aug-17 14:27 00:01 Earth 0.2340318172762 0.233975369221367 0.234088264200815 17.1680299476183 17.1673667768456 2484646.102063811 1.36346639062506 2534.31979737392 11.9001167078532 -4.11103480954944 176757.527367642 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2097-Sep-11 03:07 00:02 Earth 0.155828754276466 0.155768670191855 0.155888838753305 12.9911435781782 12.9898273251692 2487227.629991697 2.1100823800816 2313.02569627495 12.2346494268915 9.06451290967754 227461.897903703 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2123-Aug-05 05:20 < 00:01 Earth 0.472397429782232 0.472340789681153 0.472454069638612 22.4971807380878 22.4969300237602 2496685.722044881 0.960719071326489 2762.63889886794 11.7710932881574 3.43326314724807 322448.3801953 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2130-Aug-27 19:25 00:02 Earth 0.0869830854259702 0.0869344154763593 0.0870317608020049 14.6044198365256 14.6023222280535 2499265.309017777 1.66133585832187 2212.79316622312 12.0079046788206 -26.0217401773899 377480.967739144 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2137-Sep-24 01:04 00:01 Earth 0.289168100991425 0.289129915069015 0.289206286389994 13.8191426930958 13.818475899607 2501849.544183538 1.1617404067372 1615.03090702468 12.6857393883548 -6.06917171504005 280928.910894467 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2163-Aug-07 05:08 < 00:01 Earth 0.437991650641926 0.437965929540721 0.438017371673116 21.7008024270396 21.7005220944833 2511297.713715727 0.469625563963866 1245.35581502554 11.7653329960976 2.48993739879514 219717.050968334 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2170-Aug-28 08:55 00:01 Earth 0.0781235322950843 0.0780864601242183 0.0781606095881137 14.4958897790611 14.4935367848629 2513875.871392414 1.34901157086756 1734.03518368916 12.0435280581512 -29.6213658885988 379800.176113595 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56
2177-Sep-22 14:02 00:02 Earth 0.272047287600621 0.271998066958848 0.272096507382607 13.5973847362026 13.5966644185236 2516458.084484360 1.53564456373508 2042.33295293761 12.6195819601475 -5.44628414666772 236740.979411415 T 282 CATAB v2.0c-linF95 2014-Oct-09 13:56:46 2014-Oct-09 13:56

Alternate Designations
 1981 ET3 = 1983 CN1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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