Orbital Elements as of 2/14/00

(for Eros-centered orbital elements during Eros
orbit phase, see NEAR Trajectory Database)

Initial Event Final Event Keplerian Elements in Sun-Centered Mean-of-J2000 Ecliptic Coordinates 
Date Time (UTC) Date Time (UTC) a (AU) e i ° W ° w ° MA i ° MA f °
DETUMBLE MODMP-1 1.589558636 0.378401626 0.77515 148.66451 1.81956 359.20498 2.65270
17-Feb-1996 21:17:46 24-Feb-1996 21:32:46              
MODMP-1 TCM-1 1.587093326 0.377439679 0.77355 148.64052 1.82767 2.66692 6.08580
24-Feb-1996 21:32:46 02-Mar-1996 20:00:00              
TCM-1 TCM-2 1.586434241 0.377105200 0.76273 148.35879 2.14150 6.07644 102.19939
02-Mar-1996 20:00:00 13-Sep-1996 17:00:00              
TCM-2 TCM-3 1.586166702 0.377309410 0.76145 148.44602 2.04367 102.19213 158.84847
13-Sep-1996 17:00:00 06-Jan-1997 13:00:00              
TCM-3 TCM-4 1.586132299 0.377345165 0.76171 148.44418 2.04822 158.84179 170.18534
06-Jan-1997 13:00:00 29-Jan-1997 14:00:00              
TCM-4 TCM-5 1.586134065 0.377342915 0.76179 148.44150 2.05029 170.21175 239.37954
29-Jan-1997 14:00:00 18-Jun-1997 18:30:11              
TCM-5 TCM-7 1.585884007 0.377537309 0.76191 148.44068 2.06543 239.36743 246.91218
18-Jun-1997 18:30:11 03-Jul-1997 10:30:10              
TCM-7 TCM-8 1.563140967 0.392199801 0.51528 122.77882 29.50883 245.14991 255.31038
03-Jul-1997 10:30:10 23-Jul-1997 14:06:00              
TCM-8 TCM-9 1.562576634 0.392542360 0.51537 122.80180 29.53662 255.26787 314.34858
23-Jul-1997 14:06:00 17-Nov-1997 15:59:59              
TCM-9 TCM-10 1.563073217 0.392794302 0.51645 122.63785 29.70592 314.34986 341.18721
17-Nov-1997 15:59:59 09-Jan-1998 15:00:02              
TCM-10 ESB* 1.563062073 0.392791018 0.51641 122.63889 29.70548 341.18676 358.24316
09-Jan-1998 15:00:02 23-Jan-1998 07:22:56              
ESB* TCM-12 1.377247933 0.286548426 10.04373 303.02896 186.94807 356.35675 38.04218
23-Jan-1998 07:22:56 01-Apr-1998 16:00:02              
TCM-12 TCM-15 1.377040913 0.286416313 10.04322 303.01323 186.94854 38.06655 157.63928
01-Apr-1998 16:00:02 14-Oct-1998 17:00:00              
TCM-15 TCM-16 1.377124669 0.286340336 10.04352 303.01240 186.95050 157.63960 198.62860
14-Oct-1998 17:00:00 20-Dec-1998 21:59:57              
TCM-16 TCM-17 1.378201722 0.285318948 10.02747 302.98257 186.96201 198.62408 207.02521
20-Dec-1998 21:59:57 03-Jan-1999 17:00:00              
TCM-17 TCM-18 1.457926205 0.224159154 10.75981 304.62212 178.28261 214.69162 224.20971
03-Jan-1999 17:00:00 20-Jan-1999 17:00:00              
TCM-18 TCM-19 1.458312801 0.223712343 10.79079 304.69921 178.14347 224.25608 338.42772
20-Jan-1999 17:00:00 12-Aug-1999 17:00:00            
TCM-19 TCM-20 1.457340918 0.223202247 10.82152 304.57952 178.29799 338.37834 16.99864
12-Aug-1999 17:00:00 20-Oct-1999 15:30:00            
TCM-20 TCM-21 1.457399842 0.223234221 10.82140 304.57882 178.30145 16.99538 43.32435
20-Oct-1999 15:30:00 06-Dec-1999 15:30:00            
TCM-21 TCM-22 1.457428729 0.223253326 10.82135 304.57688 178.30613 43.32014 76.40563
06-Dec-1999 15:30:00 03-Feb-2000 17:00:00              
TCM-22 TCM-23 1.457918592 0.222980429 10.82469 304.48071 178.50185 76.33448 79.25058
03-Feb-2000 17:00:00 08-Feb-2000 22:00:00              
TCM-23 EROS ORBIT 1.457833762 0.223028083 10.82398 304.49656 178.46934 79.26261 82.47181
08-Feb-2000 22:00:00 14-Feb-2000 15:33:06              
* Earth-Centered Mean-ofJ2000 Earth Equator Keplerian Elements for Earth Swingby +/- 1.5 days are:
21-Jan-1998 19:22:56 24-Jan-1998 19:22:56 -8493.2955 km 1.81369 107.9717 88.2523 145.1142 (Periapsis Alt. =
538.834 km)

Glossary of Terms:
    ESB Earth Swingby (Gravity Assist)
MA Mean Anomaly (i for "initial", f for "final")
MODMP Momentum Dump
Periapsis Alt Actual closest approach altitude above sub-spacecraft sea level point
RND Rendezvous Braking Maneuver
TCM Trajectory Correction Maneuver

Last Updated on 02/05/00
By J McAdams