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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 279 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4228053158007711 6.7253e-08  
a 1.768163216866419 5.0855e-09 AU
q 1.020574409571905 1.191e-07 AU
i 22.16304164805206 7.0467e-06 deg
node 336.1239435843165 1.1839e-05 deg
peri 27.71335178434893 1.3905e-05 deg
M 208.6644304686781 1.0481e-05 deg
tp 2457161.511028335888
(2015-May-19.01102834)
2.5768e-05 JED
period 858.7800647488968
2.35
3.705e-06
1.014e-08
d
yr
n .4191992976749667 1.8085e-09 deg/d
Q 2.515752024160932 7.2357e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1590  
   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      .49276  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-16 05:46:10  

Additional Information
 Earth MOID = .0435912 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 0.388074625977742 0.388071462524829 0.388077789429035 20.2912394580852 20.2909010878493 2423640.429325554 0.0662776983802564 151.027133371438 12.5440847093223 1.68463870813646 357111.979823009 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
1930-Aug-29 19:23 < 00:01 Earth 0.0523921907066418 0.0523909192745993 0.0523934621969872 13.9543896977474 13.9507447469107 2426218.307839461 0.0751597417457118 87.8072397513724 13.6566034269481 -55.776755009492 372479.471455178 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
1937-Sep-23 01:30 < 00:01 Earth 0.299783808031121 0.29978146006496 0.29978615599526 14.1610335246163 14.1604058727009 2428799.562368503 0.0715007512868275 101.016184504214 14.3243019026733 -6.1149216607372 434518.995155806 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
1970-Aug-18 03:36 < 00:01 Earth 0.223786906320243 0.223784291883999 0.223789520753969 16.873012795468 16.8723071376947 2440816.649706269 0.062536309742137 116.049470948022 12.6451538194476 -3.47706822307444 274867.200549042 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
1977-Sep-07 14:11 < 00:01 Earth 0.113707653422685 0.11370536807704 0.113709938775088 13.0821012319167 13.0803099048459 2443394.091284014 0.0850355157165401 92.3027639672219 13.4240432821322 20.9164205897075 368055.106609555 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
1984-Oct-08 08:01 < 00:01 Earth 0.451048385387496 0.451046478158962 0.451050292616128 16.769585132018 16.7692328654185 2445981.834065528 0.051829112332813 93.9567301635427 13.9988525449011 -11.8897263755205 1012906.65975186 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2010-Aug-11 12:57 < 00:01 Earth 0.338836109373888 0.338834934088195 0.33883728465932 19.2694047268352 19.2689966339994 2455420.039753941 0.019173202148385 54.3137947272672 11.4135006145184 6.02612587458927 898858.695777167 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2017-Sep-01 12:06 < 00:01 Earth 0.0472367213836632 0.047236266361949 0.0472371764231422 13.5346237537236 13.5304555081011 2457998.004028928 0.0438240497372495 52.6525124206549 12.2331620796688 76.5586794189718 433960.951265181 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2024-Oct-01 03:49 < 00:01 Earth 0.381687421692416 0.381684179952412 0.381690663430133 15.307072858661 15.3066168019732 2460584.659271093 0.0924320209399496 150.630968868643 13.1490546914856 -8.9245192994875 622707.921971387 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2050-Aug-11 02:01 < 00:01 Earth 0.348112717160743 0.348102448408171 0.348122985890936 19.5125724800299 19.5121802125514 2470029.583883998 0.199076490168212 482.502359332714 11.9041442215042 0.965338052038821 113178.966298176 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2057-Sep-02 00:41 < 00:01 Earth 0.0499573003327949 0.049951660044532 0.0499629427156979 13.4723749766643 13.4684155431381 2472608.528368498 0.389671991970634 444.737164225855 12.2384415841772 61.5646080960613 413377.285288393 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2064-Oct-05 16:50 < 00:01 Earth 0.416618812369042 0.416597449469109 0.416640175249327 15.9545811963311 15.9541803355877 2475199.201606131 0.506585162903828 1033.66846693028 13.2307303026244 -13.2439070356937 885595.019933892 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2090-Aug-17 14:27 00:01 Earth 0.234031774661846 0.23397532664526 0.234088221548216 17.1680291262734 17.1673659553483 2484646.102066434 1.36346555950412 2534.31803111449 11.9001162107639 -4.11103736119472 176757.609834514 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2097-Sep-11 03:07 00:02 Earth 0.155828801359433 0.155768717316808 0.155888885794283 12.9911436502724 12.9898273976684 2487227.629994800 2.11008078818809 2313.02407439193 12.2346498627939 9.06450497247471 227461.761660614 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2123-Aug-05 05:20 < 00:01 Earth 0.472397383157289 0.472340743093794 0.472454022976083 22.4971796396792 22.4969289253146 2496685.722047647 0.960718487546618 2762.63703719021 11.7710920110529 3.43326237401663 322448.308822242 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2130-Aug-27 19:25 00:02 Earth 0.086983045621829 0.0869343757104493 0.0870317209596365 14.6044192169355 14.6023216074144 2499265.309021030 1.66133488275857 2212.79167267798 12.0079042345939 -26.0217563204192 377481.02099223 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2137-Sep-24 01:04 00:01 Earth 0.289168131049608 0.289129945150882 0.289206316424496 13.8191430796073 13.8184762862064 2501849.544187095 1.16173966320487 1615.02996342024 12.6857383088473 -6.06917439402006 280929.091000445 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2163-Aug-07 05:08 < 00:01 Earth 0.437991676249476 0.437965955170677 0.43801739725826 21.7008030534527 21.700522720921 2511297.713714275 0.469625133165744 1245.35473822392 11.7653325472492 2.48993803055683 219717.135098809 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2170-Aug-28 08:55 00:01 Earth 0.0781235665443258 0.0780864943966264 0.0781606438141712 14.4958903482531 14.4935373551789 2513875.871390049 1.34901040682311 1734.03383586483 12.0435290718988 -29.6213482228271 379800.110252382 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46
2177-Sep-22 14:02 00:02 Earth 0.272047243945863 0.271998023344981 0.272096463686958 13.5973843062214 13.596663988404 2516458.084480132 1.53564339072499 2042.33116090086 12.6195826525356 -5.44628050692349 236740.768859492 T 279 CATAB v2.0c-linF95 2014-Jul-16 05:46:26 2014-Jul-16 05:46

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