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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 283 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4227883796944332 6.7264e-08  
a 1.76829307616962 5.0771e-09 AU
q 1.020679311670982 1.1914e-07 AU
i 22.16262846596738 7.0461e-06 deg
node 336.1218188887268 1.1836e-05 deg
peri 27.70418513990798 1.3903e-05 deg
M 292.5171339047465 1.0655e-05 deg
tp 2457161.498123869835
(2015-May-18.99812387)
2.5769e-05 JED
period 858.8746736294511
2.35
3.699e-06
1.013e-08
d
yr
n .4191531210004182 1.8052e-09 deg/d
Q 2.515906840668259 7.2236e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1598  
   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      .49167  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Dec-16 05:19:55  

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 0.388074599897924 0.388071436505777 0.38807776328845 20.2912388184436 20.2909004481742 2423640.429327551 0.066273850955562 151.024152434083 12.5426391629501 1.68486751500123 357128.123621927 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
1930-Aug-29 19:23 < 00:01 Earth 0.0523921833278506 0.0523909118987452 0.0523934548152578 13.9543895019071 13.9507445505058 2426218.307840770 0.0751567454532822 87.8060564329884 13.6552227456348 -55.7761228510598 372514.015080838 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
1937-Sep-23 01:30 < 00:01 Earth 0.299783818742402 0.299781470824745 0.299786166658036 14.1610336076865 14.1604059557972 2428799.562368352 0.0714996842453586 101.014226024998 14.322357377646 -6.11426061090481 434529.116347621 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
1970-Aug-18 03:36 < 00:01 Earth 0.223786905349474 0.223784290951719 0.223789519744711 16.8730127258109 16.8723070680317 2440816.649706861 0.0625330749542183 116.047670795593 12.6435375046202 -3.47651432569053 274868.513642621 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
1977-Sep-07 14:11 < 00:01 Earth 0.113707654011316 0.113705368726472 0.113709939302918 13.0821011951905 13.080309868124 2443394.091283872 0.0850339762309375 92.300817952489 13.4222169051035 20.9171601779255 368110.465425197 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
1984-Oct-08 08:01 < 00:01 Earth 0.451048385283928 0.451046478109937 0.451050292457864 16.76958513687 16.7692328702705 2445981.834066749 0.0518290551931347 93.9542827895843 13.9961406754426 -11.8894265944282 1013029.79146284 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2010-Aug-11 12:57 < 00:01 Earth 0.33883611093919 0.338834935681174 0.338837286196976 19.2694047360221 19.2689966431884 2455420.039753717 0.0191722509068899 54.3126156457752 11.412042914075 6.02601218546992 898894.128117033 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2017-Sep-01 12:06 < 00:01 Earth 0.0472367212290425 0.047236266213105 0.0472371762627327 13.5346237336285 13.5304554879862 2457998.004028922 0.0438232004722972 52.6508877473303 12.2322328179452 76.557612118534 433992.032163992 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2024-Oct-01 03:49 < 00:01 Earth 0.381687416268017 0.381684174629564 0.381690657904183 15.3070727248886 15.3066166681903 2460584.659270370 0.092428173502847 150.626080530994 13.1472746615819 -8.92504150756387 622804.48606233 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2050-Aug-11 02:01 < 00:01 Earth 0.348112737906779 0.348102469578137 0.348123006213043 19.5125728931442 19.5121806256974 2470029.583883190 0.199070395077905 482.48252196369 11.9029191234754 0.965264710085414 113183.101594232 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2057-Sep-02 00:41 < 00:01 Earth 0.0499572887928267 0.0499516487133892 0.0499629309667286 13.4723751447433 13.4684157103518 2472608.528366703 0.389657299752471 444.718891556971 12.2376654436916 61.5644836177986 413402.920574233 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2064-Oct-05 16:50 < 00:01 Earth 0.41661876556647 0.416597403543669 0.416640127569626 15.9545801993949 15.9541793385814 2475199.201600412 0.506563603524811 1033.62586805443 13.2287950771622 -13.2439771506328 885728.773714281 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2090-Aug-17 14:27 00:01 Earth 0.234031903910067 0.233975458296341 0.234088348393674 17.1680316373056 17.1673684668437 2484646.102058995 1.363409534377 2534.2104516711 11.8990912189425 -4.11104819214898 176773.372728637 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2097-Sep-11 03:07 00:02 Earth 0.155828663423572 0.155768581921004 0.155888745318336 12.9911434756316 12.9898272218447 2487227.629984588 2.10999198073696 2312.92591480987 12.2338319172995 9.06449589747056 227476.534257828 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2123-Aug-05 05:20 < 00:01 Earth 0.472397508943706 0.472340871326915 0.472454146315819 22.4971825513277 22.4969318370623 2496685.722042209 0.960678898552067 2762.51782196401 11.7696979902374 3.4332542171179 322485.709409886 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2130-Aug-27 19:25 00:02 Earth 0.0869831511621603 0.0869344833498081 0.0870318244004546 14.6044208733491 14.6023232666113 2499265.309013096 1.66126472561443 2212.69618533011 12.0070932967842 -26.0217411705539 377506.783956405 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2137-Sep-24 01:04 00:01 Earth 0.289168052466386 0.289129868198834 0.289206236210146 13.8191421072348 13.8184753136058 2501849.544178619 1.16168951086844 1614.96061334748 12.6844387381297 -6.06921641465902 280959.628700584 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2163-Aug-07 05:08 < 00:01 Earth 0.437991601484502 0.437965881523722 0.438017321375275 21.7008012068598 21.7005208742563 2511297.713719705 0.469602539256087 1245.30052171984 11.7639934611067 2.48996048469505 219743.299658898 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2170-Aug-28 08:55 00:01 Earth 0.0781234671074665 0.0780863965793564 0.0781605427572898 14.4958887095766 14.4935357132412 2513875.871398022 1.34894987249493 1733.95813626367 12.0427203958317 -29.6213630917062 379825.286256572 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20
2177-Sep-22 14:02 00:02 Earth 0.272047370570411 0.271998152131964 0.272096588149144 13.5973855657665 13.5966652483511 2516458.084491120 1.53557608048711 2042.24191927453 12.618358782895 -5.44625201013827 236762.564388826 T 283 CATAB v2.0c-linF95 2014-Dec-16 05:20:03 2014-Dec-16 05:20

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