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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 275 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4228052507665658 6.4792e-08  
a 1.768163222841963 4.7742e-09 AU
q 1.020574528012048 1.1453e-07 AU
i 22.16304537851195 6.9612e-06 deg
node 336.1239586994568 1.1953e-05 deg
peri 27.71334805232657 1.4048e-05 deg
M 208.6644230227693 1.0618e-05 deg
tp 2457161.511047928172
(2015-May-19.01104793)
2.5973e-05 JED
period 858.7800691022946
2.35
3.4782e-06
9.523e-09
d
yr
n .4191992955499275 1.6978e-09 deg/d
Q 2.515751917671879 6.7928e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1578  
   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      .5138  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-06 08:00:49  

Additional Information
 Earth MOID = .0435913 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. 2013-Sep-12) 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 0.388075626650489 0.388072634038103 0.388078619261426 20.2912597020723 20.2909213330464 2423640.429302327 0.0642211965162397 142.925230686852 12.3863166228887 1.32981397847456 368354.260234208 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
1930-Aug-29 19:23 < 00:01 Earth 0.0523927244954925 0.0523915559058422 0.0523938931365486 13.954398356053 13.9507534446188 2426218.307806630 0.0711645617661708 82.1355527499304 13.1940649678178 -56.5589185603584 389101.823678982 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
1937-Sep-23 01:30 < 00:01 Earth 0.299782966670691 0.299780761698808 0.299785171640838 14.1610225617631 14.1603949076002 2428799.562278914 0.0658253895621905 94.8980085598689 13.7360400695644 -6.67827245809288 474154.702776649 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
1970-Aug-18 03:36 < 00:01 Earth 0.223788046179812 0.223785596565561 0.223790495791872 16.8730329281344 16.8723272747976 2440816.649668219 0.059866712512694 108.815717079176 12.5387717910283 -3.86866427117456 296736.16749962 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
1977-Sep-07 14:11 < 00:01 Earth 0.113706712578953 0.113704543902451 0.113708881261183 13.0821039206254 13.0803125790998 2443394.091218230 0.0803785804486265 87.2396153005542 13.1011194688262 20.3784173167829 370819.494795315 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
1984-Oct-08 08:01 < 00:01 Earth 0.451047621749445 0.451045797189084 0.451049446309751 16.7695664450301 16.7692141774416 2445981.833943347 0.0491382227059985 89.7546573180806 13.7835190073407 -12.2161600576009 1057390.73239202 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2010-Aug-11 12:57 < 00:01 Earth 0.338836239380389 0.338835054036999 0.338837424723512 19.2694053817053 19.26899728904 2455420.039778093 0.019230754802444 54.8626433788114 11.2278641962215 5.97029356897644 893059.415541492 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2017-Sep-01 12:06 < 00:01 Earth 0.047236866877279 0.0472364361403455 0.0472372976323416 13.5346228727369 13.5304546396836 2457998.004055530 0.0438606145465291 52.1883216967164 11.4249667418943 77.0701051375989 465504.739788731 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2024-Oct-01 03:49 < 00:01 Earth 0.381687874909279 0.381684691978066 0.381691057838265 15.3070799811302 15.3066239251961 2460584.659290989 0.0925042512285452 147.829696875712 12.5649446001755 -8.82251259486415 642010.353787081 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2050-Aug-11 02:01 < 00:01 Earth 0.348111467681799 0.348101368751964 0.348121566590023 19.5125426352101 19.5121503657237 2470029.583987407 0.195008997623125 474.527137056216 11.53468306533 1.04135023147351 118646.647575102 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2057-Sep-02 00:41 < 00:01 Earth 0.0499581247235689 0.049952596894613 0.0499636545795556 13.4723629495475 13.4684035778324 2472608.528488157 0.383272158274019 437.062854575177 11.3368597331049 61.6491435372738 446609.629143789 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2064-Oct-05 16:51 < 00:01 Earth 0.416621484514363 0.41660048788205 0.416642481128007 15.9546343344386 15.9542334776014 2475199.201869483 0.499752130345151 1015.91593973997 12.7585193071339 -13.2365832405392 917830.915608691 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2090-Aug-17 14:28 00:01 Earth 0.234025223167731 0.23396968010377 0.234080765136836 17.167898142689 17.1672349481381 2484646.102482027 1.34103070327727 2493.64494937868 11.3646398672631 -4.09708118685677 184430.945756042 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2097-Sep-11 03:08 00:02 Earth 0.155835848101319 0.155776737239067 0.155894959345691 12.9911513349179 12.9898351426151 2487227.630571503 2.07707599920875 2275.5883041244 11.2714463459001 9.07672032442035 247224.398136021 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2123-Aug-05 05:20 < 00:01 Earth 0.472390951872527 0.47233520382609 0.472446699682046 22.4970237097135 22.4967729901978 2496685.722433359 0.944923737163659 2719.14201621892 11.5382292564115 3.44541522149361 330103.309499084 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2130-Aug-27 19:26 00:02 Earth 0.0869775804425084 0.0869296699310494 0.0870254962043376 14.6043305048786 14.6022327508019 2499265.309443729 1.63507231138791 2178.00620068233 11.2335742379486 -26.0077306797488 403269.496097793 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2137-Sep-24 01:04 00:01 Earth 0.289172548516398 0.289134974199542 0.289210122325969 13.8191948745022 13.8185280937869 2501849.544608304 1.14481988085756 1589.07404987109 11.9040971368884 -6.05749784669107 298734.754032509 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2163-Aug-07 05:08 < 00:01 Earth 0.437994599830265 0.437969283167188 0.43801991642544 21.700869237606 21.7005889078004 2511297.713588080 0.462849983860778 1225.76320784303 11.4948106768954 2.46286070563664 222475.460967221 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2170-Aug-28 08:54 00:01 Earth 0.0781278148026801 0.078091329389843 0.078164305185518 14.4959568624401 14.4936040081198 2513875.871095824 1.32800823203989 1706.89876088016 11.2535057913461 -29.6398784629806 406714.289097163 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00
2177-Sep-22 14:01 00:02 Earth 0.272041813075434 0.271993347824625 0.272090277492646 13.5973278833226 13.5966075481356 2516458.083947075 1.5104573709086 2011.07750097614 11.8081610696881 -5.45531483971342 253369.462839994 T 275 CATAB v2.0c-linF95 2014-Apr-06 08:00:53 2014-Apr-06 08:00

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