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 ]  
4444 Escher (1985 SA)
Classification: Main-belt Asteroid          SPK-ID: 2004444
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1353697909124731 8.1589e-09  
a 2.323221970665179 6.3157e-09 au
q 2.00872789825297 2.1182e-08 au
i 7.39237248287451 5.2506e-07 deg
node 121.2535323969258 5.0742e-06 deg
peri 181.6149302066266 9.2493e-06 deg
M 69.74169131727884 8.2752e-06 deg
tp 2459145.932661114063
(2020-Oct-23.43266111)
2.9776e-05 TDB
period 1293.404852895917
3.54
5.2742e-06
1.444e-08
d
yr
n .2783351239126439 1.135e-09 deg/d
Q 2.637716043077388 7.1707e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2672  
   data-arc span      12843 days (35.16 yr)  
   first obs. used      1985-08-13  
   last obs. used      2020-10-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43458  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:21:21  

Additional Information
 Earth MOID = .992858 au 
 Jupiter MOID = 2.57097 au 
 T_jup = 3.553 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457421.5 (2016-Feb-03.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1348703961480175 8.1708e-09  
q 2.011141628199068 2.1207e-08 au
tp 2457852.239222907644
(2017-Apr-08.73922291)
3.0692e-05 TDB
node 121.2867928430514 5.0733e-06 deg
peri 181.6205584455746 9.263e-06 deg
i 7.391650252430339 5.2478e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2672  
   data-arc span      12843 days (35.16 yr)  
   first obs. used      1985-08-13  
   last obs. used      2020-10-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43458  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:21:21  

Additional Information
 Jupiter MOID = 2.57097 au 
 T_jup = 3.553 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.676265925371117E-17 -1.679259114728316E-16 -4.469606919438006E-14 7.124742382324879E-15 -1.531012649177436E-14 2.084010378812876E-16
q -1.679259114728316E-16 4.497503104281526E-16 6.510997403765258E-14 -1.586083559080533E-14 2.238567734823341E-14 -4.045198073157204E-16
tp -4.469606919438006E-14 6.510997403765258E-14 9.420086367576221E-10 -1.085521812745679E-11 2.405495511843318E-10 -2.887196736313533E-13
node 7.124742382324879E-15 -1.586083559080533E-14 -1.085521812745679E-11 2.573873602647647E-11 -2.73670914805965E-11 2.430030836890402E-12
peri -1.531012649177436E-14 2.238567734823341E-14 2.405495511843318E-10 -2.73670914805965E-11 8.58030425302091E-11 -2.358338386309272E-12
i 2.084010378812876E-16 -4.045198073157204E-16 -2.887196736313533E-13 2.430030836890402E-12 -2.358338386309272E-12 2.753967741796674E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.73   n/a E2021B10  
rotation period rot_per 47.307 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]

4444 Escher           Discovered 1985 Sept. 16 by H. U. Norgaard-Nielsen, L. Hansen and P. R. Christensen at the European Southern Observatory.
The prints of Dutch graphic artist Maurits C. Escher (1898-1972) are characterized by their sophisticated use of visual illusion. The name was suggested by J. Meeus.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-24 09:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin