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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 280 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4227883801182804 6.7269e-08  
a 1.768293076194758 5.0772e-09 AU
q 1.020679310936005 1.1915e-07 AU
i 22.16262852378333 7.0467e-06 deg
node 336.121818783861 1.1839e-05 deg
peri 27.70418515637208 1.3905e-05 deg
M 292.5171339093014 1.0655e-05 deg
tp 2457161.498123862402
(2015-May-18.99812386)
2.5769e-05 JED
period 858.8746736477649
2.35
3.6991e-06
1.013e-08
d
yr
n .4191531209914806 1.8052e-09 deg/d
Q 2.51590684145351 7.2238e-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-Aug-13 14:00:19  

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 0.388074619510077 0.388071456056942 0.388077782961592 20.2912392746682 20.2909009044236 2423640.429326803 0.0662776967534717 151.027143215204 12.5440847477335 1.68463927195537 357111.96547547 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
1930-Aug-29 19:23 < 00:01 Earth 0.0523921882042289 0.0523909167723379 0.052393459694423 13.9543896492422 13.9507446982187 2426218.307839742 0.0751597355023952 87.8072342579501 13.6566032933145 -55.7767576213427 372479.46816211 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
1937-Sep-23 01:30 < 00:01 Earth 0.299783813123254 0.299781465157213 0.299786161087272 14.1610335776502 14.1604059257479 2428799.562368333 0.0715007483740295 101.016179715788 14.3243019265428 -6.11492075305672 434518.993160921 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
1970-Aug-18 03:36 < 00:01 Earth 0.223786902738937 0.22378428830271 0.223789517172647 16.8730127433457 16.872307085559 2440816.649706047 0.0625363103772652 116.049470061647 12.6451538443568 -3.47706839988219 274867.200630348 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
1977-Sep-07 14:11 < 00:01 Earth 0.113707655526747 0.113705370181094 0.113709940879159 13.0821012301995 13.0803099031616 2443394.091283549 0.0850355150122233 92.3027639394437 13.4240433063485 20.9164200641902 368055.105281773 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
1984-Oct-08 08:01 < 00:01 Earth 0.451048386572694 0.45104647934443 0.451050293800904 16.7695852087881 16.7692329421911 2445981.834067510 0.0518291137516052 93.9567298397754 13.9988526210275 -11.8897273077702 1012906.71234079 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2010-Aug-11 12:57 < 00:01 Earth 0.338836109392979 0.338834934107286 0.338837284678409 19.2694047606163 19.2689966677813 2455420.039753160 0.0191732023706316 54.3137947511411 11.4135006098389 6.02612601053173 898858.699869638 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2017-Sep-01 12:06 < 00:01 Earth 0.0472367214547884 0.0472362664330712 0.04723717649427 13.5346237574221 13.5304555118071 2457998.004028603 0.0438240499487865 52.6525128660627 12.2331620122009 76.5586792901594 433960.954121738 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2024-Oct-01 03:49 < 00:01 Earth 0.381687422120829 0.381684180380266 0.381690663859104 15.3070728752437 15.3066168185568 2460584.659271429 0.0924320389493008 150.630995339204 13.1490535150797 -8.92451883418948 622707.915154508 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2050-Aug-11 02:01 < 00:01 Earth 0.3481127183258 0.348102449570619 0.348122987058601 19.5125725181847 19.5121802507083 2470029.583883660 0.199076537984161 482.502482040759 11.9041432666194 0.965338378114573 113178.961967836 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2057-Sep-02 00:41 < 00:01 Earth 0.049957299533541 0.0499516592442166 0.0499629419175068 13.4723749892792 13.4684155556934 2472608.528368457 0.389672087054835 444.737274591023 12.2384394880525 61.5646099389095 413377.356788813 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2064-Oct-05 16:50 < 00:01 Earth 0.416618808482565 0.416597445578696 0.416640171366787 15.9545811146881 15.954180253939 2475199.201605533 0.506585257607587 1033.66865312398 13.2307297585904 -13.2439067757229 885595.028988687 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2090-Aug-17 14:27 00:01 Earth 0.234031786686841 0.23397533865878 0.234088233584686 17.1680293664539 17.1673661955721 2484646.102065673 1.36346581091879 2534.31856026942 11.9001155339802 -4.11103661959295 176757.597739762 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2097-Sep-11 03:07 00:02 Earth 0.155828788016216 0.15576870396103 0.155888872463628 12.9911436388634 12.9898273861455 2487227.629994270 2.11008127869433 2313.0245608894 12.2346489864273 9.06450708079604 227461.810802365 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2123-Aug-05 05:20 < 00:01 Earth 0.472397393996288 0.472340753921625 0.47245403382625 22.4971799317743 22.4969292174187 2496685.722046168 0.960718687170664 2762.63759025238 11.7710915670614 3.43326273362681 322448.362455508 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2130-Aug-27 19:25 00:02 Earth 0.086983053719941 0.0869343837987469 0.0870317290675626 14.6044193546151 14.6023217453091 2499265.309020141 1.66133515384088 2212.79206901553 12.0079036777472 -26.0217529893129 377481.029977659 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2137-Sep-24 01:04 00:01 Earth 0.289168126076411 0.289129940172715 0.289206311456268 13.8191430083729 13.8184762149571 2501849.544185876 1.16173979383534 1615.03015998035 12.6857382074277 -6.06917373329265 280929.057280246 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2163-Aug-07 05:08 < 00:01 Earth 0.437991665258485 0.43796594416678 0.438017386280177 21.7008027890323 21.7005224564901 2511297.713715008 0.469625377173335 1245.35535966928 11.7653313403172 2.48993771124016 219717.118614734 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2170-Aug-28 08:55 00:01 Earth 0.0781235540406424 0.0780864818801415 0.0781606313232967 14.4958901547922 14.49353716131 2513875.871390760 1.34901098983085 1734.03453017883 12.0435268279423 -29.6213545786573 379800.192422219 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00
2177-Sep-22 14:02 00:02 Earth 0.272047258109778 0.271998037489859 0.27209647786991 13.5973844501696 13.5966641323973 2516458.084481285 1.53564394200847 2042.33198014907 12.6195804479216 -5.44628164484629 236740.87221703 T 280 CATAB v2.0c-linF95 2014-Aug-13 14:00:24 2014-Aug-13 14:00

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