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1639 Bower (1951 RB)
Classification: Main-belt Asteroid          SPK-ID: 2001639
[ 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1489552693203074 1.3477e-08  
a 2.574827992723594 7.4742e-09 au
q 2.191293795613985 3.4208e-08 au
i 8.442274105621559 2.5793e-07 deg
node 324.1507771974267 2.3378e-06 deg
peri 106.2192545967904 7.0885e-06 deg
M 233.7972475577714 9.3998e-06 deg
tp 2459729.538265633560
(2022-May-30.03826563)		 4.0761e-05 TDB
period 1509.109523702861
4.13		 6.571e-06
1.799e-08		 d
yr
n .2385512743413598 1.0387e-09 deg/d
Q 2.958362189833203 8.5875e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2538  
   data-arc span      41568 days (113.81 yr)  
   first obs. used      1906-12-21  
   last obs. used      2020-10-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 12:55:06  

Additional Information
 Earth MOID = 1.22314 au 
 Jupiter MOID = 2.33371 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456508.5 (2013-Aug-04.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1501103713519062 1.3677e-08  
q 2.185858478207549 3.4753e-08 au
tp 2456717.195272102325
(2014-Feb-28.69527210)		 3.4048e-05 TDB
node 324.2179870085487 2.3421e-06 deg
peri 106.7326821856588 6.9795e-06 deg
i 8.438440070259626 2.5766e-07 deg
   Orbit Determination Parameters
   # obs. used (total)      2538  
   data-arc span      41568 days (113.81 yr)  
   first obs. used      1906-12-21  
   last obs. used      2020-10-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 12:55:06  

Additional Information
 Jupiter MOID = 2.33371 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.870513308540831E-16 -4.675088861267246E-16 3.705593719617422E-13 -2.922349384340554E-15 6.886053392922566E-14 -4.11780354523944E-16
q -4.675088861267246E-16 1.207753421774073E-15 -8.838769487885496E-13 7.488867772437449E-15 -1.607264066892311E-13 1.018564029877335E-15
tp 3.705593719617422E-13 -8.838769487885496E-13 1.159264619468804E-9 9.899646893780742E-14 2.23097401219817E-10 -2.236194848725326E-13
node -2.922349384340554E-15 7.488867772437449E-15 9.899646893780742E-14 5.485232189974552E-12 -5.209224177147011E-12 1.547236315020162E-13
peri 6.886053392922566E-14 -1.607264066892311E-13 2.23097401219817E-10 -5.209224177147011E-12 4.871298486891163E-11 -1.68156476529432E-13
i -4.11780354523944E-16 1.018564029877335E-15 -2.236194848725326E-13 1.547236315020162E-13 -1.68156476529432E-13 6.638732405645539E-14

[ 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 11.12   n/a E2021B10 IRAS observations used: 7
diameter diameter 35.676 km 0.450 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 22.181 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Polakis, T. (2018) Minor Planet Bull. 45, 112-115.]
geometric albedo albedo 0.031   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.677   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.92, mean=7.06, max.=7.20) deg.
U-B UB 0.368   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.92, mean=7.06, max.=7.20) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

1639 Bower (1951 RB)          Discovered 1951-Sep-12 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1951 RB = 1934 PT = 1936 AC = 1939 XH = 1942 NA = 1951 RV1 = 1951 TE = 1953 DK = 1953 EU1 = 1953 GV = 1957 BJ1 = A906 YD = A924 EN 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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