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1027 Aesculapia (A923 YO11)
Classification: Main-belt Asteroid          SPK-ID: 2001027
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1291690381944604 3.696e-08  
a 3.153371838000989 1.3e-08 au
q 2.746053830616903 1.1799e-07 au
i 1.252972282326216 4.0569e-06 deg
node 29.34175724274135 0.00016436 deg
peri 132.0472341838784 0.00016493 deg
M 8.16037732654512 1.4186e-05 deg
tp 2459154.137276099397
(2020-Oct-31.63727610)
8.0523e-05 TDB
period 2045.319712107399
5.60
1.2648e-05
3.463e-08
d
yr
n .1760116024252626 1.0884e-09 deg/d
Q 3.560689845385074 1.4679e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3299  
   data-arc span      41282 days (113.02 yr)  
   first obs. used      1908-01-13  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44937  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:51:52  

Additional Information
 Earth MOID = 1.75435 au 
 Jupiter MOID = 1.41713 au 
 T_jup = 3.194 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456345.5 (2013-Feb-22.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1316775677549412 3.6755e-08  
q 2.734841019272164 1.1743e-07 au
tp 2457114.400918392240
(2015-Apr-01.90091839)
7.7012e-05 TDB
node 29.43992926927734 0.00016417 deg
peri 133.1494945924638 0.00016472 deg
i 1.254745620844991 4.0583e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3299  
   data-arc span      41282 days (113.02 yr)  
   first obs. used      1908-01-13  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44937  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:51:52  

Additional Information
 Jupiter MOID = 1.41713 au 
 T_jup = 3.194 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.350946603957694E-15 -4.296815135972525E-15 2.45048536305613E-13 -2.152150001326455E-15 7.303857034379927E-14 -1.541853112676817E-16
q -4.296815135972525E-15 1.378888614051137E-14 -7.153854115294207E-13 5.510583687319506E-15 -2.309658875160202E-13 5.576021807283336E-16
tp 2.45048536305613E-13 -7.153854115294207E-13 5.930802529796021E-9 -4.265593049775855E-12 1.052392567412785E-9 -4.527799376991406E-14
node -2.152150001326455E-15 5.510583687319506E-15 -4.265593049775855E-12 2.69512157360747E-8 -2.694490300025393E-8 -9.904132950461464E-11
peri 7.303857034379927E-14 -2.309658875160202E-13 1.052392567412785E-9 -2.694490300025393E-8 2.713301830380123E-8 9.899397383578577E-11
i -1.541853112676817E-16 5.576021807283336E-16 -4.527799376991406E-14 -9.904132950461464E-11 9.899397383578577E-11 1.647005578852008E-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 10.93   n/a E2021B10  
diameter diameter 31.225 km 0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 13.529 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Hess, K.; Bruner, M.; Ditteon, R. (2017) Minor Planet Bull. 44, 3-5.]
geometric albedo albedo 0.129   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1027 Aesculapia (A923 YO11)          Discovered 1923-Nov-11 by Van Biesbroeck, G. at Williams Bay
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A923 YO11 = 1942 DH = 1977 LP1 = A899 PE = A908 AE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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