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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2088178866495661 2.0866e-08  
a 3.953338115189403 2.1485e-08 au
q 3.127810404764373 8.4409e-08 au
i 8.366997089544038 1.2468e-06 deg
node 321.9426052864881 1.2692e-05 deg
peri 47.68443444765917 1.4465e-05 deg
M 107.1518392684464 6.3992e-06 deg
tp 2458541.942095509191
(2019-Feb-27.44209551)
4.8288e-05 TDB
period 2871.07386785925
7.86
2.3405e-05
6.408e-08
d
yr
n .1253886234102454 1.0222e-09 deg/d
Q 4.778865825614433 2.5971e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3077  
   data-arc span      29411 days (80.52 yr)  
   first obs. used      1940-11-29  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42348  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:44:38  

Additional Information
 Earth MOID = 2.13435 au 
 Jupiter MOID = .858061 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 9.95   n/a E2021B10 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 19.724 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 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.]
[Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 123-124.]
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 < 00:01 Jupiter 1.83714324582663 1.83714298841693 1.83714350323632 4.56002332580307 4.45776899793467 2421106.212440208 0.925248432421122 18.8512618274178 10.8916424234645 -77.9317850524315 7173074.06114277 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
1940-Jul-20 19:59 00:01 Jupiter 1.84362337182929 1.84362312145731 1.84362362220126 4.50561843761576 4.40246866178552 2429831.332765453 1.22206177024136 24.4649348185197 10.6581313396013 -84.7089393107583 6913494.04379832 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
1964-May-18 13:23 00:01 Jupiter 1.85515428007042 1.85515403743052 1.85515452271031 4.48476348907441 4.38177449009431 2438534.057510790 1.17180835611729 24.1406987980723 10.4492919840797 -87.0608540080601 6760036.34461304 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
1988-Jan-18 20:47 < 00:01 Jupiter 1.86686057417045 1.86686034519502 1.86686080314587 4.55657967460813 4.45589367859111 2447179.366170977 0.760785305799361 18.6704869440183 9.94334917060993 80.2176597489691 7275588.16795362 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2011-Jul-22 20:09 < 00:01 Jupiter 1.88209996388671 1.88209972483371 1.88210020293971 4.74235480317344 4.64648756538399 2455765.339649490 0.228711247494746 13.4969299303241 7.33552557249656 43.304236522039 8766462.6183749 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2034-Dec-04 00:25 < 00:01 Jupiter 1.89150882666374 1.89150858294591 1.89150907038157 4.98462632854849 4.89396511001431 2464300.517262203 0.587089953003649 19.2944648117416 10.4174847372891 72.6146106187185 8309675.44699867 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2058-Mar-24 21:40 00:01 Jupiter 1.87741392087562 1.8774136387891 1.87741420296224 5.15433430861473 5.06604709481206 2472812.402970250 1.03675446498967 34.5431869192472 9.94380369911865 73.263531554374 9764990.36711785 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2081-Jul-22 05:13 00:01 Jupiter 1.84162606028246 1.84162567719118 1.84162644337394 5.16929853869029 5.07954561445127 2481332.717298151 1.24958407138113 38.7340697881898 8.50681559619921 63.9842357295201 12028795.3139174 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2104-Dec-19 03:31 00:01 Jupiter 1.81090942485011 1.81090898471159 1.81090986498873 5.11500106627657 5.02272530124407 2489882.646799754 1.1804173090251 31.0517393477973 7.58051535782624 49.12197168947 14382163.0538495 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2128-Jul-06 09:54 < 00:01 Jupiter 1.77834503542733 1.77834460234995 1.77834546850471 5.02892864052935 4.93330790679816 2498482.912685720 0.888633654317649 24.5181409271019 8.06365795714181 34.9180257503744 11655599.2280143 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2152-Mar-15 18:14 < 00:01 Jupiter 1.76717877158141 1.76717837703464 1.76717916612817 4.99651546127972 4.89964807109073 2507136.259756333 0.626267601071357 21.7021640763038 7.96274207515966 32.4250046946577 11451068.0866386 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2176-Jan-05 23:11 < 00:01 Jupiter 1.76920552612746 1.76920515871592 1.769205893539 5.00071135027145 4.90403880885891 2515832.466206514 0.782682531242933 21.516872593668 7.39680993416416 37.948062689446 11611214.0228385 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46
2199-Nov-16 06:04 00:01 Jupiter 1.76565951469397 1.76565915087676 1.76565987851118 4.97777879430607 4.88045503541129 2524547.753046551 1.07756387781499 24.7994242937297 8.77790708044914 49.5067539990805 8514849.44459787 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 12:45:59 2021-Jul-08 12:46

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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