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18366 (1991 DG1)
Classification: Main-belt Asteroid          SPK-ID: 2018366
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1510979745909476 3.0369e-08  
a 3.107660223671859 1.6097e-08 au
q 2.63809905815819 9.3084e-08 au
i 4.957368483337567 3.7321e-06 deg
node 173.9015746757038 4.0634e-05 deg
peri 271.0521062544084 4.267e-05 deg
M 189.0169880002406 1.4797e-05 deg
tp 2459950.884146128240
(2023-Jan-06.38414613)
8.6625e-05 TDB
period 2001.007518844314
5.48
1.5547e-05
4.257e-08
d
yr
n .1799093689602519 1.3978e-09 deg/d
Q 3.577221389185528 1.8529e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1713  
   data-arc span      20642 days (56.51 yr)  
   first obs. used      1962-12-30  
   last obs. used      2019-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51132  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:24:27  

Additional Information
 Earth MOID = 1.66014 au 
 Jupiter MOID = 1.68001 au 
 T_jup = 3.197 
[ 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 13.5   n/a MPO347667  
diameter diameter 7.337 km 0.247 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.227   0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18366 (1991 DG1)          Discovered 1991-Feb-18 by Helin, E. F. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1950-Jun-22 18:05 00:02 Jupiter 1.78324196950517 1.78324127575287 1.78324266325818 2.62864829091113 2.44127249081901 2433455.253774561 1.57000613966778 91.5261090124861 10.7587794937367 86.0247348856116 2441602.38979887 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24
1960-May-07 18:44 00:01 Jupiter 1.73867810944594 1.73867769956595 1.73867851932572 1.69003439517166 1.37181884854756 2437062.280697010 1.33172947566018 55.3541880056735 32.9771835481317 -62.528586096435 2568773.71952158 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24
2021-Feb-09 19:33 < 00:01 Jupiter 1.70167030854756 1.70166993679867 1.70167068029624 2.03577664595417 1.77450489050877 2459255.314782195 0.26813559765299 43.4102319268277 18.6316902225828 85.2102957854896 2633371.52835406 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24
2030-Dec-27 11:56 < 00:01 Jupiter 1.83449111345239 1.83449071962353 1.83449150728115 2.03063460074869 1.78886430102125 2462862.997533232 0.496597971548203 44.0419538630982 11.3170689670545 -77.5239519324388 2926807.37520894 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24
2081-Nov-01 22:01 00:02 Jupiter 1.92777556049501 1.92777483554702 1.92777628544443 3.62039401241511 3.49692671450142 2481435.417561688 1.66714555171281 103.144390947378 14.5136693704087 76.6270949971616 3490297.97821003 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24
2091-Sep-29 22:06 00:02 Jupiter 1.67404613480535 1.67404575528825 1.67404651432245 1.68141943859785 1.34730281876217 2485054.420683154 2.03239866618394 79.4870969687476 55.7474207419079 -54.9807266671099 2301472.20859336 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24
2101-Aug-23 16:34 00:02 Jupiter 1.96308992711647 1.96308889349265 1.96309096074106 2.54456820101984 2.36894049572706 2488669.190077904 2.18287200745582 100.675659944724 15.099137555249 79.0607772283331 2686040.28503713 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24
2152-Jul-02 20:44 00:03 Jupiter 1.80178874118542 1.80178753493795 1.80178994743996 2.88564738003963 2.71785926681186 2507245.363962095 3.47882319674307 206.506381517069 11.8769083050647 82.8575720295993 2783179.1521931 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24
2162-May-21 03:05 00:04 Jupiter 1.70953562982831 1.70953469445094 1.7095365652047 1.62496205198575 1.28435312918758 2510854.628656966 3.84273108459995 60.6545053281859 44.7362713558229 -76.4946304764353 1785256.55006719 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 22:24:54 2020-Feb-22 22:24

Alternate Designations
 1991 DG1 = 1962 YA = 1999 RK118 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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