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JPL Small-Body Database Browser
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1628 Strobel (A923 RT)
Classification: Main-belt Asteroid          SPK-ID: 2001628
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06688755288843992 3.1857e-08  
a 3.010955051183259 1.1225e-08 au
q 2.809559635952523 9.5336e-08 au
i 19.38764890973743 4.2913e-06 deg
node 181.173499379981 1.0489e-05 deg
peri 288.7383140243076 3.4054e-05 deg
M 73.31667598593258 3.1544e-05 deg
tp 2458611.853195494510
(2019-May-08.35319549)
0.00016733 TDB
period 1908.335965051415
5.22
1.0672e-05
2.922e-08
d
yr
n .1886460280542377 1.055e-09 deg/d
Q 3.212350466413994 1.1976e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2688  
   data-arc span      35294 days (96.63 yr)  
   first obs. used      1923-09-11  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42083  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:27:43  

Additional Information
 Earth MOID = 1.88273 au 
 Jupiter MOID = 1.89391 au 
 T_jup = 3.160 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456663.5 (2014-Jan-06.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06869839186674456 3.1908e-08  
q 2.80678881633911 9.6055e-08 au
tp 2456710.141701552526
(2014-Feb-21.64170155)
0.00016342 TDB
node 181.2524011105306 1.05e-05 deg
peri 290.121237041424 3.3163e-05 deg
i 19.36963081676776 4.289e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2688  
   data-arc span      35294 days (96.63 yr)  
   first obs. used      1923-09-11  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42083  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:27:43  

Additional Information
 Jupiter MOID = 1.89391 au 
 T_jup = 3.160 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.018138847037599E-15 -3.046747404788717E-15 6.21529112264421E-13 -4.486895398521494E-16 1.083109935059611E-13 -1.172522815548749E-15
q -3.046747404788717E-15 9.22651981384136E-15 -2.147583797362008E-12 1.339670976560109E-15 -3.80817990818396E-13 2.585460531044552E-15
tp 6.21529112264421E-13 -2.147583797362008E-12 2.670602314082861E-8 -2.179129453942199E-11 5.154145111468615E-9 -1.752175293772391E-12
node -4.486895398521494E-16 1.339670976560109E-15 -2.179129453942199E-11 1.102567312341881E-10 -1.077769899550108E-10 -1.883624414935803E-12
peri 1.083109935059611E-13 -3.80817990818396E-13 5.154145111468615E-9 -1.077769899550108E-10 1.099775783461298E-9 1.437661313243354E-12
i -1.172522815548749E-15 2.585460531044552E-15 -1.752175293772391E-12 -1.883624414935803E-12 1.437661313243354E-12 1.83953291735921E-11

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 10.3   n/a MPO502169 IRAS observations used: 12
diameter diameter 59.345 km 0.484 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.52 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:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.047   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.840   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.41 deg.
U-B UB 0.320   0.060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.41 deg.

1628 Strobel (A923 RT)          Discovered 1923-Sep-11 by Reinmuth, K. at Heidelberg
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
1939-Mar-19 01:16 00:01 Jupiter 1.92064939557681 1.92064892435775 1.92064986679752 5.7642681177059 5.68724626985162 2429341.552686662 1.11756226294864 151.434440761192 18.378673040837 -84.4079118897832 4516576.06256471 T 32 CATAB v2.0f-lin.ifort 2020-May-20 01:27:55 2020-May-20 01:28
2070-Mar-10 21:53 < 00:01 Jupiter 1.89461779305241 1.89461741344839 1.89461817265686 5.99991346393043 5.92493257958143 2477181.411606782 0.869196594926126 127.608375865913 16.9139436574664 86.7269782119212 4844372.64528163 T 32 CATAB v2.0f-lin.ifort 2020-May-20 01:27:55 2020-May-20 01:28
2117-Jan-10 16:24 00:02 Jupiter 1.92859352714117 1.92859287043324 1.92859418385524 5.71888208147506 5.64156260327693 2494288.183394977 1.6216443736984 212.904146586223 18.5043088349212 -82.4978489731908 4469394.41799742 T 32 CATAB v2.0f-lin.ifort 2020-May-20 01:27:55 2020-May-20 01:28

Alternate Designations
 A923 RT = 1926 GY = 1947 GC = 1949 QA2 = 1952 DV2 = 1957 CA = 1960 WH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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