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 ]  
4827 Dares (1988 QE)
Classification: Jupiter Trojan          SPK-ID: 2004827
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04320966394805029 2.7702e-08  
a 5.128624189004492 7.1852e-08 au
q 4.907018061281766 1.3968e-07 au
i 7.70308850504582 1.8457e-06 deg
node 242.0414220203011 8.9729e-06 deg
peri 169.2359352439619 3.3119e-05 deg
M 205.6678224728061 3.2633e-05 deg
tp 2461019.169252820039
(2025-Dec-09.66925282)
0.00041 TDB
period 4242.284023368033
11.61
8.9152e-05
2.441e-07
d
yr
n .0848599476171303 1.7833e-09 deg/d
Q 5.350230316727218 7.4957e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2147  
   data-arc span      24207 days (66.28 yr)  
   first obs. used      1954-11-23  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46452  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:49:42  

Additional Information
 Earth MOID = 3.91742 au 
 Jupiter MOID = .00790797 au 
 T_jup = 2.980 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457345.5 (2015-Nov-19.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04624888178456559 2.7323e-08  
q 4.880290794445993 1.3555e-07 au
tp 2456791.103651919855
(2014-May-13.60365192)
0.00032742 TDB
node 242.0707207558102 8.9752e-06 deg
peri 169.5938858434554 3.0885e-05 deg
i 7.706215312826179 1.8462e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2147  
   data-arc span      24207 days (66.28 yr)  
   first obs. used      1954-11-23  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46452  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:49:42  

Additional Information
 Jupiter MOID = .00790797 au 
 T_jup = 2.980 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.465397722257131E-16 -3.233741810652262E-15 5.263555505148282E-13 2.314675068288456E-14 -2.148089335778962E-14 1.028191861748753E-14
q -3.233741810652262E-15 1.837289137783424E-14 8.434866082268059E-12 -9.83590000011077E-14 1.117867199606901E-12 -4.89983701234398E-14
tp 5.263555505148282E-13 8.434866082268059E-12 1.072036846998432E-7 1.809477275889876E-10 9.639233246323976E-9 3.971045696228439E-11
node 2.314675068288456E-14 -9.83590000011077E-14 1.809477275889876E-10 8.055410084341959E-11 -6.537647183148917E-11 1.306709485632544E-11
peri -2.148089335778962E-14 1.117867199606901E-12 9.639233246323976E-9 -6.537647183148917E-11 9.538913799391657E-10 -9.870455886892369E-12
i 1.028191861748753E-14 -4.89983701234398E-14 3.971045696228439E-11 1.306709485632544E-11 -9.870455886892369E-12 3.408278729927215E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.58   n/a E2021B10  
diameter diameter 42.770 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 18.995 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.067   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

4827 Dares (1988 QE)          Discovered 1988-Aug-17 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-13 21:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin