7 KM

19 KM 19 KM

19 KM 19 KM

7 KM19 KM19 KM

OBSERVATIONS

DERIVEDPRODUCTS

MAJOR DATAPRODUCTS

OPNAVOBSERVATIONS

- NAVCAM SAMPLING EVERY 3 HOURS

MASSESTIMATION (2%)

DOPPLER TRACKING- LGA & HGA TRACKING DURING ALL FLYBYS

YARKVOSKYACCELERATION

(DERIVED)

OLA OBSERVATIONSMAPCAM DISTANTOBSERVATIONS

75CM SHAPE MODELSPC + OLA

BENNU SPIN STATE(DERIVED)

BENNU COORDINATESYSTEM(DERIVED)

MAPCAM CLOSEOBSERVATIONS

MAPCAMPHOTOMETRIC

MODELS

MAPCAM HIGH PHASE ANGLE OBSERVATIONS

SPECTROSCOPIC OBSERVATIONS

- OTES ON: MAPCAM CLOSE & DISTANT - OVIRS ON: MAPCAM DISTANT EXCEPT NP1

BENNUNORTH

BENNUNORTH BENNU

NORTHBENNUNORTH

FRONT VIEW 3/4 VIEW SIDE VIEW

SPECTROSCOPIC OBSERVATIONS

Dates subject to change

PROGRESSION OF LEVEL-1 SCIENCE REQUIREMENTS BY PHASE

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0

GLOBALPROPERTIESCOMPLETED

SAMPLE SITE COMPLETED

APPR. SURVEY RECON REHEARSAL TAG

POINT-SOURCE PROPERTIES COMPLETED

POINT-SOURCE PROPERTIESYARKOVSKY EFFECTSOPERATIONAL ENVIRONMENTSURFACE CHARACTERISTICS

DENSITY AND GRAVITYGEOPHYSICAL PROPERTIESSHAPESAMPLE SITE

The primary goals of Preliminary Survey are to observe the sun-lit side of Bennu and both poles in order to determine a preliminary mass estimation of Bennu, refine the

Bennu shape and spin state models, and generate a global 75cm shape model.Preliminary SurveyS C I E N C E P H A S E P L A N • D E C E M B E R 2 0 1 8

M1ADEC 19

DEC 4DEC 5 DEC 3

DEC 13DEC 12

DEC 16DEC 17

DEC 11DEC 10

DEC 14DEC 15

OLAMAPCAM CLOSEMAPCAM DISTANT OLA MAPCAM DISTANT

MAPCAM DISTANT

MAPCAM DISTANTMAPCAM DISTANT

MAPCAM DISTANT MAPCAM CLOSE OLA OLA

MAPCAM DISTANT MAPCAM DISTANT

MAPCAM HPA

MAPCAM

HPA

OLA OLA

OLAMAPCAM CLOSE OLA

DEC 7

DEC 6

DEC 8DEC 9 M3P

M6P

M7P

M2P

M4P

M5P

M1P

M#P = MANEUVER # PRELIMINARY SURVEY

DERIVED FROM PRELIMINARY SURVEY SPPV9CLAST UPDATED: 07-03-2018