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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 314 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4227360292299534 6.6942e-08  
a 1.76862821116621 4.8579e-09 au
q 1.020965343993731 1.1853e-07 au
i 22.16217552629283 7.0059e-06 deg
node 336.1211540750799 1.1049e-05 deg
peri 27.72297361892632 1.2983e-05 deg
M 100.1458138767246 1.1017e-05 deg
tp 2457161.507898197204
(2015-May-19.00789820)
2.5733e-05 JED
period 859.1188519863128
2.35
3.5396e-06
9.691e-09
d
yr
n .4190339894971078 1.7264e-09 deg/d
Q 2.516291078338689 6.9115e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1735  
   data-arc span      13486 days (36.92 yr)  
   first obs. used      1979-03-09  
   last obs. used      2016-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49614  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-10 06:24:33  

Additional Information
 Earth MOID = .0433248 au 
 Jupiter MOID = 2.98925 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 LCDB (Rev. 2015-December); Warner et al., 2009 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
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 0.388075130106076 0.388072039624409 0.3880782205862 20.2912496346219 20.2909112649952 2423640.429299853 0.0646236508869271 147.585449746381 12.2582613202215 1.71616917131903 366200.625888435 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
1930-Aug-29 19:23 < 00:01 Earth 0.0523924090082304 0.0523911655983384 0.0523936524730741 13.9543933265556 13.9507483918562 2426218.307816371 0.073049779954602 85.5453071323204 13.5844096011551 -55.6659694601806 374072.930044934 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
1937-Sep-23 01:30 < 00:01 Earth 0.299783358643328 0.299781082974988 0.299785634309752 14.1610282645827 14.1604006114933 2428799.562327218 0.0695641194907791 97.9996500366969 14.0565456123842 -6.09257781108024 445482.785688457 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
1970-Aug-18 03:36 < 00:01 Earth 0.223787534820584 0.223785032794266 0.223790036844582 16.8730237207514 16.872318065417 2440816.649671942 0.0594465141130524 111.030718260658 12.3836149312356 -3.21182946896413 280981.810131598 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
1977-Sep-07 14:11 < 00:01 Earth 0.113707077794959 0.113704903936594 0.113709251659502 13.0821023698924 13.0803110339085 2443394.091241120 0.0813685110315536 87.9951672789765 13.2557989570643 21.2149127988152 378764.967503293 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
1984-Oct-08 08:01 < 00:01 Earth 0.451047896210878 0.451046084640429 0.451049707781292 16.7695750022183 16.7692227350239 2445981.834007203 0.0502420925009745 89.4098667867656 13.5557834853261 -11.7879588864846 1046488.78889572 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2010-Aug-11 12:57 < 00:01 Earth 0.338836177285819 0.338835007447703 0.338837347123703 19.2694050561635 19.2689969634165 2455420.039752119 0.0190002299809428 54.0946452584568 11.0492754823766 6.23699962800846 914262.464427791 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2017-Sep-01 12:06 < 00:01 Earth 0.047236747366922 0.0472362948229958 0.0472371999282815 13.5346227749226 13.5304545312918 2457998.004035997 0.0434895767358376 52.2827538891524 12.1882100982812 76.5622041198819 435572.268018293 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2024-Oct-01 03:49 < 00:01 Earth 0.381687671839255 0.381684463662942 0.381690880013324 15.307078010479 15.3066219542435 2460584.659295670 0.0917245151466829 149.035173038337 12.7944937834494 -8.93950011221568 638289.4239083 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2050-Aug-11 02:01 < 00:01 Earth 0.348111827235359 0.348101685000602 0.348121969448311 19.512551632011 19.5121593631105 2470029.583936974 0.196704385299213 476.529923892383 11.6235946720367 0.973647366271452 115331.214069997 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2057-Sep-02 00:41 < 00:01 Earth 0.0499578157999146 0.0499522469485171 0.0499633866936095 13.4723659686157 13.468406573301 2472608.528442864 0.384895006012442 439.148784107107 12.1930327906178 61.5684820539264 414936.967388665 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2064-Oct-05 16:51 < 00:01 Earth 0.416620711886244 0.416599620447876 0.416641803305405 15.9546206317043 15.9542197737794 2475199.201814605 0.500483614765006 1020.48770090782 12.8236504428695 -13.2437798329161 913655.289218426 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2090-Aug-17 14:27 00:01 Earth 0.234026816415455 0.23397108524605 0.234082546483164 17.1679302044278 17.1672670156306 2484646.102361538 1.34624218222239 2502.10187894144 11.7120683088489 -4.10990056361693 179539.575466691 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2097-Sep-11 03:08 00:02 Earth 0.155834092338858 0.155774772608321 0.155893412451657 12.9911490157341 12.9898328083662 2487227.630426902 2.08342804660366 2283.59749564842 12.1371550709784 9.06453572525136 229298.742243572 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2123-Aug-05 05:20 < 00:01 Earth 0.472392415965373 0.472336496221561 0.472448335470585 22.497059969497 22.4968092511625 2496685.722322601 0.94857462027765 2727.47202093659 11.3918981064592 3.43479951321854 333293.271176894 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2130-Aug-27 19:25 00:02 Earth 0.0869787843922488 0.08693073366081 0.0870268404135914 14.6043502388023 14.6022525165994 2499265.309332217 1.6403152388937 2184.63219856298 11.9303950697491 -26.0221706307696 379920.068388016 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2137-Sep-24 01:04 00:01 Earth 0.289171497390682 0.289133798502557 0.289209195768314 13.8191830691674 13.8185162854587 2501849.544517838 1.14718371976842 1594.4022172619 12.4289961834798 -6.06854359863257 286694.482319519 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2163-Aug-07 05:08 < 00:01 Earth 0.437993928411629 0.437968533751001 0.438019323004017 21.7008548048986 21.7005744744768 2511297.713594032 0.463586764938529 1229.57986337787 11.4121996518867 2.48665659198263 226052.737146194 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2170-Aug-28 08:54 00:01 Earth 0.0781268212912411 0.0780902197079089 0.0781634278672615 14.4959415065284 14.4935886197924 2513875.871146956 1.33175951804519 1712.03030556127 11.9721308923087 -29.6212316235499 382080.586727444 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24
2177-Sep-22 14:01 00:02 Earth 0.272042950268749 0.271994354277818 0.272091545421456 13.5973400628732 13.5966197313427 2516458.084066588 1.51590655231388 2016.43793661558 12.3854957076367 -5.44665772634638 241221.673451072 T 314 CATAB v2.0c-linF95 2016-Feb-10 06:24:42 2016-Feb-10 06:24

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