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718 Erida (A911 SA)
Classification: Main-belt Asteroid          SPK-ID: 2000718
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1988492674836727 4.1112e-08  
a 3.057679989168623 1.3365e-08 au
q 2.449662563122958 1.2574e-07 au
i 6.926489547305695 4.7e-06 deg
node 38.53232073026434 3.1078e-05 deg
peri 174.5477378614649 3.2385e-05 deg
M 263.1501277093528 1.0629e-05 deg
tp 2459525.891479109546
(2021-Nov-07.39147911)
5.9273e-05 TDB
period 1952.929085046424
5.35
1.2804e-05
3.506e-08
d
yr
n .184338490709427 1.2086e-09 deg/d
Q 3.665697415214288 1.6023e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3036  
   data-arc span      43006 days (117.74 yr)  
   first obs. used      1902-12-24  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4127  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:29:03  

Additional Information
 Earth MOID = 1.44363 au 
 Jupiter MOID = 1.30044 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456227.5 (2012-Oct-27.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2009087029600294 4.0818e-08  
q 2.440065383280471 1.2479e-07 au
tp 2455626.323793465589
(2011-Mar-05.82379347)
5.168e-05 TDB
node 38.62529718506134 3.1093e-05 deg
peri 174.889059708367 3.2391e-05 deg
i 6.929262679742568 4.701e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3036  
   data-arc span      43006 days (117.74 yr)  
   first obs. used      1902-12-24  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4127  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:29:03  

Additional Information
 Jupiter MOID = 1.30044 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.666104642602972E-15 -5.075090662568612E-15 -1.461407057573111E-13 -4.290720242951701E-15 -1.197570835060673E-14 4.231483480059301E-16
q -5.075090662568612E-15 1.557151260638432E-14 4.686489355395242E-13 1.22293841468977E-14 4.618339960896341E-14 -9.364783479573359E-16
tp -1.461407057573111E-13 4.686489355395242E-13 2.670807631268492E-9 -1.68840501695397E-12 4.841756981092317E-10 -7.610214148690669E-13
node -4.290720242951701E-15 1.22293841468977E-14 -1.68840501695397E-12 9.667480168131881E-10 -9.596696225178708E-10 -7.049346226031E-12
peri -1.197570835060673E-14 4.618339960896341E-14 4.841756981092317E-10 -9.596696225178708E-10 1.049166988408646E-9 6.862526736746604E-12
i 4.231483480059301E-16 -9.364783479573359E-16 -7.610214148690669E-13 -7.049346226031E-12 6.862526736746604E-12 2.209904225640784E-11

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 9.7   n/a MPO384751  
diameter diameter 70.911 km 1.283 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 17.447 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Galad, A.; Vilagi, J.; Kornos, L.; Gajdos, S. (2009) Minor Planet Bull. 36, 116-118.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.042   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

718 Erida (A911 SA)          Discovered 1911-Sep-29 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A911 SA = 1952 JK = 1963 KL = 1979 QG10 = A902 YD = A904 JA = A920 GE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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