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 ]  
1312 Vassar (1933 OT)
Classification: Main-belt Asteroid          SPK-ID: 2001312
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .211104370792031 3.0404e-08  
a 3.098141833021858 1.157e-08 au
q 2.444110550737309 9.54e-08 au
i 21.94045941218721 3.9743e-06 deg
node 129.2318811876123 9.0373e-06 deg
peri 261.4925723162191 1.3049e-05 deg
M 321.7780372848937 1.0737e-05 deg
tp 2459411.975886630052
(2021-Jul-16.47588663)
5.9788e-05 TDB
period 1991.821292754531
5.45
1.1158e-05
3.055e-08
d
yr
n .180739106118375 1.0125e-09 deg/d
Q 3.752173115306407 1.4013e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2901  
   data-arc span      31931 days (87.42 yr)  
   first obs. used      1933-07-27  
   last obs. used      2020-12-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37083  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:35:54  

Additional Information
 Earth MOID = 1.55709 au 
 Jupiter MOID = 2.12977 au 
 T_jup = 3.079 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456358.5 (2013-Mar-07.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2168080279808363 3.0542e-08  
q 2.422592768786076 9.6345e-08 au
tp 2455433.391081970929
(2010-Aug-24.89108197)
5.4776e-05 TDB
node 129.4756936576038 9.0865e-06 deg
peri 261.3496446587062 1.2847e-05 deg
i 21.90161861857973 3.9706e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2901  
   data-arc span      31931 days (87.42 yr)  
   first obs. used      1933-07-27  
   last obs. used      2020-12-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37083  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:35:54  

Additional Information
 Jupiter MOID = 2.12977 au 
 T_jup = 3.079 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.327987229645183E-16 -2.930815701456874E-15 -6.546660258076912E-14 8.446372391373055E-16 1.571528104820497E-14 5.708357335075803E-16
q -2.930815701456874E-15 9.282360692266286E-15 1.786528894674116E-13 -3.36706172472523E-15 -4.522336462299021E-14 -1.349789649858286E-15
tp -6.546660258076912E-14 1.786528894674116E-13 3.000386054582812E-9 4.386366435081563E-12 5.084097029216102E-10 2.508265080795754E-12
node 8.446372391373055E-16 -3.36706172472523E-15 4.386366435081563E-12 8.256411660829591E-11 -7.557985636684684E-11 -8.476612122123771E-12
peri 1.571528104820497E-14 -4.522336462299021E-14 5.084097029216102E-10 -7.557985636684684E-11 1.65035609274504E-10 8.288226366277044E-12
i 5.708357335075803E-16 -1.349789649858286E-15 2.508265080795754E-12 -8.476612122123771E-12 8.288226366277044E-12 1.576552176877658E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.72   n/a E2021B10  
diameter diameter 36.28 km 1.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 7.932 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.0643   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6

1312 Vassar (1933 OT)          Discovered 1933-Jul-27 by Van Biesbroeck, G. at Williams Bay
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1933 OT = 1944 QE = 2019 FN5 = A908 CD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-06 20:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin