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 ]  
5621 Erb (1990 SG4)
Classification: Mars-crossing Asteroid          SPK-ID: 2005621
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3861104275436138 1.6459e-08  
a 2.30243061729565 6.7756e-09 au
q 1.41343814726212 3.802e-08 au
i 5.545382072580439 1.2873e-06 deg
node 278.9320379781237 9.5647e-06 deg
peri 5.255585666593527 1.0156e-05 deg
M 269.5481501594138 4.7177e-06 deg
tp 2459521.121917335412
(2021-Nov-02.62191734)
1.769e-05 TDB
period 1276.081035867958
3.49
5.6329e-06
1.542e-08
d
yr
n .2821137450374672 1.2453e-09 deg/d
Q 3.191423087329181 9.3918e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2068  
   data-arc span      23924 days (65.50 yr)  
   first obs. used      1955-09-17  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47047  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:45:59  

Additional Information
 Earth MOID = .395197 au 
 Jupiter MOID = 1.99105 au 
 T_jup = 3.481 
[ 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 14.01   n/a E2021B10  
diameter diameter 3.302 km 0.604 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 8.027 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]
geometric albedo albedo 0.425   0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

5621 Erb (1990 SG4)          Discovered 1990-Sep-23 by Lawrence, K. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 SG4 = 1955 ST2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-16 04:16 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin