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3122 Florence (1981 ET3)
Classification: Amor [NEO, PHA]          SPK-ID: 2003122
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 574 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4229445970466097 6.4914e-09  
a 1.768974947286482 4.1353e-09 au
q 1.020796551020853 1.2291e-08 au
i 22.14249699085034 1.857e-06 deg
node 336.0638557858437 1.2419e-06 deg
peri 27.84781913196475 4.6715e-06 deg
M 50.43779452411213 1.4176e-06 deg
tp 2458880.097768050153
(2020-Jan-31.59776805)
3.216e-06 TDB
period 859.371507237965
2.35
3.0134e-06
8.25e-09
d
yr
n .4189107934902872 1.4689e-09 deg/d
Q 2.51715334355211 5.8843e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4684  
   # delay obs. used      6  
   # Doppler obs. used      0  
   data-arc span      15287 days (41.85 yr)  
   first obs. used      1979-03-09  
   last obs. used      2021-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .29392  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-15 05:21:37  

Additional Information
 Earth MOID = .0453329 au 
 Jupiter MOID = 2.99821 au 
 T_jup = 3.920 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO452206  
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. 2020-October); 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 Bull. 39, 101-102.]
[Linder, T.; Sampson, R.; Holmes, R. (2013) Minor Planet Bull. 40, 4-6.]
[Warner, B.D. (2016) Minor Planet Bull. 43, 240-250.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Observers at Arecibo and/or Goldstone (2017) https://cneos.jpl.nasa.gov/news/news199.html]
[Stone, G. (2017) Posting on CALL web site: http://www.minorplanet.info/call.html]
[Franco, L.; Bacci, P.; Maestripieri, M.; Baj, G.; et al. (2018) Minor Planet Bull. 45, 174-177.]
[Klinglesmith III, D.A.; Hendrickx, S. (2018) Minor Planet Bull. 45, 61-63.]
[Rodrigo, O.: Fornas, G.; Arce, E.; Mas, V.; et al. (2018) Minor Planet Bull. 45, 120-121.]
[Tomassini, A.; Scardella, M.; Franceschini, F.; Pierri, F. (2018) Minor Planet Bull. 45, 11-13.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 19-34.]
[Abrams, N.S.; Bieryla, A.; Gomez, S.; Huang, J.; et al. (2020) Minor Planet Bull. 47, 3-4.]
[Ferrais, M.; Jehin, E.; Moulane, Y.; Pozuelos, Francisco J.; et al. (2020) Minor Planet Bull. 47, 21-22.]
[Núñez-López, R.; Loera-González, P.; Saucedo, J.C.; Olguín, L.; Contreras, M.E. (2020) Minor Planet Bull. 47, 89-90.]
geometric albedo albedo 0.231   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
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 0.388075545845531 0.388073992791926 0.388077098899466 20.2912563520415 20.2909179828894 2423640.429305120 0.126978630917635 79.5752030167658 3.24635906038424 -13.3034204758522 3733538.85135317 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
1930-Aug-29 19:23 < 00:01 Earth 0.0523926493360497 0.0523919624576613 0.0523933362496728 13.9543953145224 13.9507503970641 2426218.307816610 0.12018581606486 75.9512605255717 0.96516574221295 -63.2035051475232 6677767.91575409 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
1937-Sep-23 01:30 < 00:01 Earth 0.299782943815526 0.299781415168433 0.299784472466147 14.1610218330836 14.1603941788406 2428799.562302867 0.20345294551152 91.9709560489598 6.09013052786841 34.1091705053157 3512419.51067283 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
1970-Aug-18 03:36 < 00:01 Earth 0.223788172280472 0.223785776137457 0.223790568426934 16.8730333568874 16.8723277039661 2440816.649661190 0.20563540026226 127.265132254013 2.62659014597004 -20.1442644752183 3935586.58862916 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
1977-Sep-07 14:11 < 00:01 Earth 0.113706535564066 0.113704287742536 0.113708783499566 13.0821020393407 13.0803106947685 2443394.091218933 0.253215419938202 211.674766501546 2.1852601769433 58.0295612046821 6461745.49247881 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
1984-Oct-08 08:01 < 00:01 Earth 0.451047456346016 0.451045487892087 0.451049424801919 16.7695642048177 16.769211937053 2445981.833961888 0.323142342306804 109.004045999067 9.62877472745479 25.8867649375721 2583867.82923155 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2010-Aug-11 12:57 < 00:01 Earth 0.338836333949356 0.338835877245268 0.338836790653482 19.2694058109576 19.2689977184153 2455420.039770507 0.0383947742505959 23.5034418713938 2.97743263807747 -14.4342039109418 4242615.53806017 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2017-Sep-01 12:06 < 00:01 Earth 0.0472367774354369 0.047236771177445 0.0472367836934288 13.5346213319898 13.5304530905681 2457998.004056812 0.00252292495622436 2.91555809562698 0.309257905214511 -89.1565230056006 24782419.3749332 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2024-Oct-01 03:49 < 00:01 Earth 0.381687662148735 0.381687202710534 0.381688121587046 15.3070767523389 15.3066206960543 2460584.659302867 0.0666231708314899 25.5929101816572 8.24824380064746 28.0913107872744 3139665.26870104 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2050-Aug-11 02:01 < 00:01 Earth 0.34811180691475 0.348109752509818 0.348113861320434 19.512548532721 19.5121562637354 2470029.583965318 0.165630305922473 105.568005878262 2.96096774821513 -13.9807851516852 3812161.65404423 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2057-Sep-02 00:41 < 00:01 Earth 0.049957895389594 0.0499567061384504 0.0499590848185531 13.4723635237519 13.4684041340273 2472608.528471806 0.240078150456489 160.059602059153 0.969819572422079 68.253227683782 8127109.78076366 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2064-Oct-05 16:51 < 00:01 Earth 0.416620852793565 0.416616402288407 0.416625303309523 15.9546224616859 15.9542216039426 2475199.201835214 0.706731141232995 245.917580029064 9.33691584276947 25.5406346951013 2389495.48954342 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2090-Aug-17 14:27 < 00:01 Earth 0.234026578746296 0.234014854737943 0.234038302824477 17.1679228764495 17.1672596866957 2484646.102403874 0.994592958269443 618.410128107962 2.53352037609223 -19.0285487093735 4028983.50560979 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2097-Sep-11 03:08 00:01 Earth 0.155834380248796 0.155821873575957 0.155846889469172 12.9911478782976 12.9898316732463 2487227.630469823 1.46058369809701 1173.16527396748 2.71833679676467 57.8829026708712 6374372.18405444 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2123-Aug-05 05:20 < 00:01 Earth 0.472392220646014 0.472380453637315 0.472403987664032 22.4970525754933 22.4968018569727 2496685.722361262 0.925259994339545 596.013762818333 3.13649505926584 -10.1059638639025 3555479.02037439 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2130-Aug-27 19:25 00:01 Earth 0.0869786403770295 0.0869685408328904 0.0869887406397335 14.6043453398031 14.6022476134229 2499265.309370555 1.05191914167383 639.60217204208 1.48128031257624 -38.0562300810742 4924821.95482943 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2137-Sep-24 01:04 00:01 Earth 0.289171655317112 0.289163692364769 0.289179618401448 13.8191838182271 13.8185170349187 2501849.544548468 1.12420793577583 502.613044245286 6.1256300434592 37.8159823851906 3629034.78671107 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2163-Aug-07 05:08 < 00:01 Earth 0.437994046516387 0.437988715931473 0.437999377103591 21.7008546911952 21.7005743608476 2511297.713617056 0.419985424078797 270.489431604965 2.99774337576227 -10.6719281135676 3638259.52653568 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2170-Aug-28 08:54 < 00:01 Earth 0.0781269834843583 0.0781192837223927 0.0781346837899073 14.4959414990589 14.4935886172067 2513875.871162437 0.839743091041784 503.045024789355 1.3391848842538 -40.2469038535401 5136139.6761416 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21
2177-Sep-22 14:01 00:01 Earth 0.272042838474457 0.27203266201546 0.272053015210828 13.597337729564 13.5966173976138 2516458.084071424 1.41382718145883 667.227309991063 5.70570313091122 40.4897494421127 3887184.07454772 T 574 CATAB v2.0f-lin.ifort 2021-Jan-15 05:21:47 2021-Jan-15 05:21

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