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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1355787186099652 8.1485e-09  
a 2.324037733590913 6.3519e-09 au
q 2.008947675669449 2.1202e-08 au
i 7.392481227194676 5.2498e-07 deg
node 121.2547786240422 5.0732e-06 deg
peri 181.7236887491927 9.2444e-06 deg
M 15.09401459174108 8.278e-06 deg
tp 2459146.241790986658
(2020-Oct-23.74179099)
2.9768e-05 TDB
period 1294.086150909843
3.54
5.3054e-06
1.453e-08
d
yr
n .278188588717136 1.1405e-09 deg/d
Q 2.639127791512376 7.2131e-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 = .991602 au 
 Jupiter MOID = 2.57117 au 
 T_jup = 3.552 
[ show covariance matrix ]

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-Jun-14 10:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin