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 ]  
406 Erna (A895 QA)
Classification: Main-belt Asteroid          SPK-ID: 2000406
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1782617558633109 3.712e-08  
a 2.916792696281085 8.2364e-09 au
q 2.396840108752738 1.0749e-07 au
i 4.193223096293966 3.0718e-06 deg
node 315.4784704716566 5.2202e-05 deg
peri 37.51005926787319 5.3093e-05 deg
M 46.12642123295495 1.0527e-05 deg
tp 2458967.366849551307
(2020-Apr-27.86684955)
5.305e-05 TDB
period 1819.519744175763
4.98
7.7069e-06
2.11e-08
d
yr
n .1978544069952255 8.3805e-10 deg/d
Q 3.436745283809432 9.7046e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3570  
   data-arc span      43118 days (118.05 yr)  
   first obs. used      1903-02-20  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43068  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:50:35  

Additional Information
 Earth MOID = 1.39136 au 
 Jupiter MOID = 2.01104 au 
 T_jup = 3.253 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456441.5 (2013-May-29.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1825130074412214 3.733e-08  
q 2.382449981853514 1.0871e-07 au
tp 2457148.456837285345
(2015-May-05.95683729)
5.1174e-05 TDB
node 315.7879813615418 5.2265e-05 deg
peri 37.39756936657623 5.3103e-05 deg
i 4.193441716940452 3.0728e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3570  
   data-arc span      43118 days (118.05 yr)  
   first obs. used      1903-02-20  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43068  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:50:35  

Additional Information
 Jupiter MOID = 2.01104 au 
 T_jup = 3.253 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.393521944659912E-15 -4.050519416451554E-15 8.291933439940399E-13 -4.335779935735064E-15 1.126367083225778E-13 -1.457021524229672E-15
q -4.050519416451554E-15 1.181839834513477E-14 -2.433122790370666E-12 1.269872077325131E-14 -3.362145285158061E-13 4.376346329666113E-15
tp 8.291933439940399E-13 -2.433122790370666E-12 2.618766756899982E-9 1.694153423111886E-12 4.985804466797576E-10 -1.788369575628601E-12
node -4.335779935735064E-15 1.269872077325131E-14 1.694153423111886E-12 2.73164325109801E-9 -2.723642800405115E-9 1.394567799311697E-11
peri 1.126367083225778E-13 -3.362145285158061E-13 4.985804466797576E-10 -2.723642800405115E-9 2.819958716371353E-9 -1.422988999702836E-11
i -1.457021524229672E-15 4.376346329666113E-15 -1.788369575628601E-12 1.394567799311697E-11 -1.422988999702836E-11 9.441897764178076E-12

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 10.40   n/a E2021B10 IRAS observations used: 12
diameter diameter 46.266 km 0.310 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 8.789 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.060   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.738   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=9.10, mean=9.32, max.=9.53) deg.
U-B UB 0.273   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=9.10, mean=9.32, max.=9.53) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

406 Erna (A895 QA)          Discovered 1895-Aug-22 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A895 QA = 1949 KD1 = A903 DA = A905 OB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-18 10:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin