Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06688755315512331 3.1332e-08  
a 3.010955051121616 1.1114e-08 au
q 2.809559635092032 9.3462e-08 au
i 19.38764898882273 4.2861e-06 deg
node 181.1734985166777 1.0176e-05 deg
peri 288.7383150330966 3.3915e-05 deg
M 73.31667582629112 3.1517e-05 deg
tp 2458611.853196352694
(2019-May-08.35319635)
0.00016719 TDB
period 1908.335964992811
5.22
1.0566e-05
2.893e-08
d
yr
n .1886460280600309 1.0445e-09 deg/d
Q 3.2123504671512 1.1858e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2822  
   data-arc span      35343 days (96.76 yr)  
   first obs. used      1923-09-11  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41211  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:34:20  

Additional Information
 Earth MOID = 1.88273 au 
 Jupiter MOID = 1.89391 au 
 T_jup = 3.160 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456758.5 (2014-Apr-11.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06864002488503235 3.1391e-08  
q 2.806783692673651 9.4141e-08 au
tp 2456709.420003295137
(2014-Feb-20.92000329)
0.00016348 TDB
node 181.2234758846089 1.0185e-05 deg
peri 289.9922797372677 3.3048e-05 deg
i 19.37318464359419 4.2841e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2822  
   data-arc span      35343 days (96.76 yr)  
   first obs. used      1923-09-11  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41211  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:34:20  

Additional Information
 Jupiter MOID = 1.89391 au 
 T_jup = 3.160 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.854055683787041E-16 -2.937490560732624E-15 6.56394462502494E-13 2.387894721758129E-16 1.116303932040275E-13 -1.17450918791345E-15
q -2.937490560732624E-15 8.862495789531617E-15 -2.229265856818679E-12 -1.567502821419016E-15 -3.852871749219394E-13 2.780744400068258E-15
tp 6.56394462502494E-13 -2.229265856818679E-12 2.672544853762842E-8 -1.286354115813573E-11 5.151886473634497E-9 -1.729770325404065E-12
node 2.387894721758129E-16 -1.567502821419016E-15 -1.286354115813573E-11 1.037279479151119E-10 -9.988840775467021E-11 -1.357076129319653E-12
peri 1.116303932040275E-13 -3.852871749219394E-13 5.151886473634497E-9 -9.988840775467021E-11 1.092151361492797E-9 9.658634714921288E-13
i -1.17450918791345E-15 2.780744400068258E-15 -1.729770325404065E-12 -1.357076129319653E-12 9.658634714921288E-13 1.835317791228952E-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

[ show close-approach data ]
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-14 01:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin