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 ]  
2735 Ellen (1977 RB)
Classification: Inner Main-belt Asteroid          SPK-ID: 2002735
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05468000674919955 9.2609e-09  
a 1.856846065604682 3.8361e-09 au
q 1.755313710205193 1.7483e-08 au
i 23.05706225497548 3.4422e-07 deg
node 344.5631279602663 1.4924e-06 deg
peri 59.705899106799 8.13e-06 deg
M 351.4711605572132 7.5588e-06 deg
tp 2459222.395240383224
(2021-Jan-07.89524038)
1.9403e-05 TDB
period 924.1921589492609
2.53
2.864e-06
7.841e-09
d
yr
n .3895293814322053 1.2071e-09 deg/d
Q 1.95837842100417 4.0459e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2110  
   data-arc span      18183 days (49.78 yr)  
   first obs. used      1971-05-26  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4186  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:11:07  

Additional Information
 Earth MOID = .787026 au 
 Jupiter MOID = 3.17834 au 
 T_jup = 3.900 
[ 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 14.48   n/a E2021B10  
diameter diameter 3.529 km 0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 159. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.]
geometric albedo albedo 0.292   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
Tholen spectral type spec_T SDU::   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices

2735 Ellen (1977 RB)          Discovered 1977-Sep-13 by Bus, S. J. and Lauer, T. 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-Apr-22 02:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin