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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1482549669865459 1.3273e-08  
a 2.574661487434446 7.6049e-09 au
q 2.192955133613321 3.3594e-08 au
i 8.443699756342067 2.5812e-07 deg
node 324.146563639255 2.3362e-06 deg
peri 106.3130100540625 6.997e-06 deg
M 280.3782239431116 9.3456e-06 deg
tp 2459730.239792843639
(2022-May-30.73979284)
4.0068e-05 TDB
period 1508.963142669256
4.13
6.6856e-06
1.83e-08
d
yr
n .2385744156501953 1.057e-09 deg/d
Q 2.956367841255571 8.7324e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2632  
   data-arc span      41827 days (114.52 yr)  
   first obs. used      1906-12-21  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38901  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:36:29  

Additional Information
 Earth MOID = 1.22508 au 
 Jupiter MOID = 2.33481 au 
 T_jup = 3.397 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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

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 ]
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