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 ]  
1555 Dejan (1941 SA)
Classification: Main-belt Asteroid          SPK-ID: 2001555
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2757411250839087 2.2514e-08  
a 2.690532104342163 7.3883e-09 au
q 1.948641754816479 6.3049e-08 au
i 6.02197908440745 6.909e-07 deg
node 318.0306616528759 6.5898e-06 deg
peri 47.56632099862077 7.2495e-06 deg
M 340.2715879630759 3.1709e-06 deg
tp 2459288.837544628876
(2021-Mar-15.33754463)
1.4448e-05 TDB
period 1611.965322240583
4.41
6.6398e-06
1.818e-08
d
yr
n .2233298663643774 9.1991e-10 deg/d
Q 3.432422453867848 9.4256e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2803  
   data-arc span      32277 days (88.37 yr)  
   first obs. used      1932-08-01  
   last obs. used      2020-12-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41624  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:36:58  

Additional Information
 Earth MOID = .951009 au 
 Jupiter MOID = 2.06944 au 
 T_jup = 3.309 
[ show covariance matrix ]

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 11.71   n/a E2021B10  
diameter diameter 23.199 km 0.314 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.960 h n/a LCDB (Rev. 2020-October); 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:
[Brines, P.; Lozano, J.; Rodrigo, O.; Fornas, A.; et al. (2017) Minor Planet Bull. 44, 145-149.]
geometric albedo albedo 0.053   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1555 Dejan (1941 SA)          Discovered 1941-Sep-15 by Rigaux, F. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1941 SA = 1932 PC = 1934 CD1 = 1954 NJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-08 02:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin