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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 348 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4227695658183485 6.6768e-08  
a 1.76882326967957 4.7117e-09 au
q 1.021018623947747 1.1823e-07 au
i 22.15569404977256 6.8533e-06 deg
node 336.1165914560189 9.6168e-06 deg
peri 27.76532084048624 1.1552e-05 deg
M 183.8640588103719 1.1206e-05 deg
tp 2458020.907615936399
(2017-Sep-24.40761594)
2.7829e-05 JED
period 859.2609816877945
2.35
3.4333e-06
9.4e-09
d
yr
n .4189646774055465 1.674e-09 deg/d
Q 2.516627915411393 6.7037e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1922  
   data-arc span      13562 days (37.13 yr)  
   first obs. used      1979-03-09  
   last obs. used      2016-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49186  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-27 05:48:37  

Additional Information
 Earth MOID = .0445802 au 
 Jupiter MOID = 2.98917 au 
 T_jup = 3.920 
[ 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. 2016-February); 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.]
[Warner, B.D. (2016) http://www.minorplanetobserver.com/PDO/PDOLig htcurves.htm]
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 0.388074991158071 0.388071986038453 0.388077996276227 20.2912463749635 20.2909080051613 2423640.429308888 0.0623340733311452 143.51824430453 11.6450213992178 1.71444242421347 377562.004046724 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
1930-Aug-29 19:23 < 00:01 Earth 0.0523923606314296 0.0523911448419663 0.0523935764722685 13.9543921884815 13.9507472501188 2426218.307824298 0.0700936804579768 83.1167713647367 13.4430480067712 -55.4545350474851 377168.05870159 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
1937-Sep-23 01:30 < 00:01 Earth 0.29978345702329 0.299781258044036 0.299785656000722 14.1610293921086 14.1604017392752 2428799.562336755 0.0672421240104296 94.7893940399075 13.7082439066114 -5.8651050047676 453410.485744789 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
1970-Aug-18 03:36 < 00:01 Earth 0.223787446054516 0.22378504179453 0.223789850312185 16.8730219233485 16.872316267659 2440816.649678171 0.0560839434550362 106.643303124744 11.8577936624694 -2.86330821265022 286657.400742083 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
1977-Sep-07 14:11 < 00:01 Earth 0.113707157835825 0.113705085124509 0.113709230553065 13.0821020873198 13.0803107525582 2443394.091248470 0.0778429803751308 84.2160014052202 12.9854644665539 21.730588138274 395448.284053607 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
1984-Oct-08 08:01 < 00:01 Earth 0.451047960619291 0.451046235011939 0.451049686226623 16.7695762750926 16.7692240079753 2445981.834014216 0.0491052906535771 85.3255956965602 12.6993375944449 -11.5330021585584 1094733.22848297 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2010-Aug-11 12:57 < 00:01 Earth 0.338836194030366 0.338835029797244 0.338837358263194 19.269405253967 19.2689971612443 2455420.039753620 0.0188672275796178 53.8909876030794 10.2955526261907 6.54566527517693 943301.019661887 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2017-Sep-01 12:06 < 00:01 Earth 0.047236737995989 0.0472362905330483 0.0472371854757117 13.5346229731515 13.5304547287547 2457998.004035474 0.0430129871930564 51.6092542890739 12.1045843024826 76.6257991941884 438699.139902014 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2024-Oct-01 03:49 < 00:01 Earth 0.381687572703139 0.381684417889634 0.381690727514482 15.3070760722427 15.306620015831 2460584.659285701 0.0905894091971585 146.524697792974 12.3178807121815 -9.02829099849965 664877.5541753 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2050-Aug-11 02:01 < 00:01 Earth 0.34811215509891 0.348102203632892 0.348122106543902 19.5125587440665 19.5121664756785 2470029.583920020 0.193288900005618 467.551031304623 11.0058754392282 0.993711857408893 119781.569676659 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2057-Sep-02 00:41 < 00:01 Earth 0.0499576333729737 0.0499521714404209 0.0499630972703527 13.4723689631524 13.4684095542576 2472608.528418925 0.377943740922778 430.746894763246 12.1468972669846 61.5728557003225 416530.172270455 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2064-Oct-05 16:51 < 00:01 Earth 0.416620021977226 0.416599335885854 0.416640708050154 15.9546063780979 15.9542055191511 2475199.201737182 0.491392465397808 1000.84607525354 12.208083492636 -13.2531150435086 960306.469541338 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2090-Aug-17 14:27 00:01 Earth 0.234028640206067 0.233973978218026 0.234083301134157 17.1679660289975 17.1673028467525 2484646.102256729 1.32070414700481 2454.08059595201 11.2863745318011 -4.10677007437517 186157.690045761 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2097-Sep-11 03:08 00:02 Earth 0.155832149861634 0.155773969482449 0.155890330609137 12.991146940928 12.9898307169423 2487227.630270388 2.04389537942989 2239.70688877739 12.1169235554665 9.06432189464625 229677.955255929 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2123-Aug-05 05:20 < 00:01 Earth 0.472394246910244 0.472339401376503 0.47244909221451 22.4971034770977 22.4968527602199 2496685.722223910 0.930567541237058 2675.06407054109 10.5844911244284 3.4388259984645 359048.918429893 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2130-Aug-27 19:25 00:02 Earth 0.0869803572309913 0.0869332286442149 0.0870274909048323 14.6043752485162 14.6022775678413 2499265.309220707 1.60915692075946 2142.65709043841 11.7604740524261 -26.0195090519956 385380.085748517 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2137-Sep-24 01:04 00:01 Earth 0.289170261441103 0.289133288053126 0.289207234338261 13.8191684241635 13.8185016368982 2501849.544396903 1.12560990577954 1563.66695372507 12.1763437135214 -6.07174650294741 292793.495672375 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2163-Aug-07 05:08 < 00:01 Earth 0.437993098637271 0.437968191456492 0.438018005752408 21.700835084617 21.7005547534094 2511297.713642308 0.454465143586545 1205.99319579514 10.6597499258076 2.47829487777172 240733.007148591 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2170-Aug-28 08:55 00:01 Earth 0.0781256239118742 0.0780897257186432 0.0781615269090599 14.4959222593138 14.4935693333891 2513875.871239323 1.30581453701099 1679.17311011511 11.8197243263916 -29.6240776169269 387035.339720689 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49
2177-Sep-22 14:01 00:01 Earth 0.272044539471528 0.271996875773697 0.272092202362663 13.5973564731724 13.5966361467194 2516458.084220872 1.48629824098899 1977.80573339967 12.1718223650818 -5.4445451412609 245365.075345966 T 348 CATAB v2.0c-linF95 2016-Apr-27 05:48:52 2016-Apr-27 05:49

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