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1746 Brouwer (1963 RF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001746
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2085094680800158 3.865e-08  
a 3.952110943366818 2.2979e-08 au
q 3.128058392772193 1.5247e-07 au
i 8.366436156287438 4.5368e-06 deg
node 321.9455850106459 2.6757e-05 deg
peri 47.61181284631009 2.859e-05 deg
M 57.59678704148827 9.3501e-06 deg
tp 2458541.367669838333
(2019-Feb-26.86766984)
7.34e-05 TDB
period 2869.73713896818
7.86
2.5029e-05
6.853e-08
d
yr
n .1254470296639917 1.0941e-09 deg/d
Q 4.776163493961443 2.7771e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2678  
   data-arc span      29191 days (79.92 yr)  
   first obs. used      1940-11-29  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44294  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:15:53  

Additional Information
 Earth MOID = 2.13536 au 
 Jupiter MOID = .858646 au 
 T_jup = 3.003 
[ 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 9.9   n/a MPO502170 IRAS observations used: 2
diameter diameter 62.524 km 0.453 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 19.8 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Dahlgren, M.; Lahulla, J.F.; Lagerkvist, C.-I.; Lagerros, J.; et al. (1998) Icarus 133, 247-285.]
[Slyusarev, I.G.; Shevchenko, V.G.; Belskaya, I.N.; Krugly, Yu.N.; Chiorny, V.G. (2012) ACM 2012, #6398.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.048   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
B-V BV 0.721   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.87, mean=12.43, max.=12.99) deg.
U-B UB 0.227   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.87, mean=12.43, max.=12.99) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1746 Brouwer (1963 RF)          Discovered 1963-Sep-14 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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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
1916-Aug-30 17:06 00:02 Jupiter 1.83714320418855 1.83714270823526 1.83714370014195 4.5600231343063 4.45776879912976 2421106.212621263 1.829558917221 56.7802518642803 20.3455081956093 -78.9671885890064 3832003.66496575 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
1940-Jul-20 19:59 00:02 Jupiter 1.8436233453633 1.84362283606224 1.84362385466447 4.50561817224104 4.40246838811847 2429831.332958395 1.769949301649 54.1838274219998 19.6471066250664 -75.8199737674997 3762099.30248542 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
1964-May-18 13:23 00:01 Jupiter 1.85515427089336 1.85515375943758 1.85515478234925 4.4847633097378 4.3817743054515 2438534.057622492 1.44607082562681 49.4541408583922 19.285202911894 -73.0183768792569 3808997.27780256 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
1988-Jan-18 20:47 < 00:01 Jupiter 1.86686056770172 1.86686006964483 1.86686106575871 4.55657965666974 4.45589365933205 2447179.366212380 0.854833546303777 43.8232240353016 19.3708644158319 -71.3083942185315 4081215.67949804 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2011-Jul-22 20:09 < 00:01 Jupiter 1.88209994163118 1.88209945047617 1.88210043278618 4.74235494913404 4.64648771267571 2455765.339634113 0.240525032224593 40.2745021288054 19.8916804677062 -70.8385033537562 4287046.17019605 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2034-Dec-04 00:25 < 00:01 Jupiter 1.89150876184876 1.89150826703108 1.89150925666645 4.98462654473003 4.89396532655975 2464300.517200664 0.648489456490089 44.9518102129559 22.3285298097793 -80.212050614425 4215641.23901409 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2058-Mar-24 21:40 00:01 Jupiter 1.87741381714887 1.87741328577248 1.87741434852527 5.15433456849276 5.06604735380672 2472812.402880444 1.13964901038762 57.4775113908332 25.1251565894925 87.2496104737671 4038732.22490191 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2081-Jul-22 05:13 00:01 Jupiter 1.84162593894236 1.84162534292561 1.8416265349592 5.16929875940192 5.07954583259672 2481332.717248705 1.42176394588976 63.5980941840314 26.8257224066172 80.8255134422864 3722153.33799601 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2104-Dec-19 03:31 00:01 Jupiter 1.81090932349414 1.81090870558768 1.81090994140066 5.11500134158763 5.02272557588653 2489882.646819876 1.48890517958492 59.3756692446364 27.5460244016833 79.2584941277626 3457656.7661447 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2128-Jul-06 09:54 00:01 Jupiter 1.77834497369092 1.77834438081248 1.77834556656937 5.02892908136178 4.93330835229003 2498482.912805461 1.43119497460428 55.6232213421852 26.8250104124345 80.9150213497915 3410714.14318178 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2152-Mar-15 18:14 00:01 Jupiter 1.76717873404989 1.76717817696047 1.76717929113931 4.99651595898089 4.89964857601356 2507136.259870043 1.39662989379566 55.163664059205 25.3524904656652 82.2632503241882 3557794.71676613 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2176-Jan-05 23:12 00:01 Jupiter 1.76920550126586 1.76920495652634 1.76920604600548 5.00071189795458 4.90403936542724 2515832.466322903 1.46940607732774 56.7975062188316 24.741367824707 82.3745047446256 3654530.39393609 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16
2199-Nov-16 06:04 00:02 Jupiter 1.76565948776958 1.76565893056121 1.76566004497805 4.97777934162587 4.8804555916036 2524547.753039770 1.55856585121944 61.0116307394913 24.9894501920741 81.4898047538806 3630791.09505057 T 42 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:59 2020-Nov-13 04:16

Alternate Designations
 1963 RF = 1940 WE = 1947 QA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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