1. Currently Known*
  2. LSST
  3. Discoveries**
  4. Near Earth Objects
  5. Main Belt Asteroids
  6. TransNeptunian Objects
  7. (TNOs) + Scattered Disk
  8. Objects (SDOS)
  9. 10-100x increase in sample size for every
  10. small body population in the Solar System
  11. LARGE SYNOPTIC SURVEY TELESCOPE
  12. LARGE SYNOPTIC SURVEY TELESCOPE
  13. Explore dark energy and dark matter
  14. Map the Milky Way and Local Volume
  15. Explore the transient sky
  16. Inventory the Solar System
  17. u g r i z y
  18. # visits 70 100 230 230 200 200
  19. m5 depth 23.9 25.0 24.7 24.0 23.3 22.1
  20. See Mario Juric’s talk tomorrow!
  21. Effective Mirror Diameter
  22. 6.7 m
  23. u g r i z y
  24. # visits 70 100 230 230 200 200
  25. m5 depth 23.
  26. 25. 0
  27. 24.7 24.0 23.3 22.1
  28. Effective Mirror Diameter
  29. 6.7 m
  30. u g r i z y
  31. # visits 70 100 230 230 200 200
  32. m5 depth 23.
  33. 25. 0
  34. 24.7 24.0 23.3 22.1
  35. Currently Known*
  36. LSST
  37. Discoveries**
  38. Near Earth Objects
  39. Main Belt Asteroids
  40. TransNeptunian Objects
  41. (TNOs) + Scattered Disk
  42. Objects (SDOS)
  43. 10-100x increase in sample size for every
  44. small body population in the Solar System
  45. Identify families, see compositional trends, determine size
  46. distribution - understand collisional history of asteroids.
  47. Identify families, see compositional trends, determine size
  48. distribution - understand collisional history of asteroids.

Asteroid Detection with
the Large Synoptic
Survey Telescope (LSST)
Lynne Jones (University of Washington/LSST)

XXIX IAU - Honolulu - 8/3/2015
Planetary science & LSST
2
Currently
Known*

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LSST

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Discoveries**
Median number
of observations
+
Observational
arc length
+

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Near Earth Objects
(NEOs)
12,832
100,000
(D>250m) 60
6.0 years

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Main Belt Asteroids
(MBAs)
636,499
5,500,000 (D>500m) 200
8.5 years
Jupiter Trojans
6,387
280,000
(D>2km) 300
8.7 years

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TransNeptunian Objects

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(TNOs) + Scattered Disk

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Objects (SDOS)
1,921
40,000
(D>200km) 450
8.5 years
Plus: comets, irregular satellites, Earth minimoons and temporary satellites ..

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10-100x increase in sample size for every

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small body population in the Solar System
* As reported by the MPC ** Expected by end of survey
+
For the brightest objects (near 100% completeness)

XXIX IAU - Honolulu - 8/3/2015
3

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LARGE SYNOPTIC SURVEY TELESCOPE

XXIX IAU - Honolulu - 8/3/2015
3

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LARGE SYNOPTIC SURVEY TELESCOPE

Back to top


Explore dark energy and dark matter

Back to top


Map the Milky Way and Local Volume

Back to top


Explore the transient sky

Back to top


Inventory the Solar System

XXIX IAU - Honolulu - 8/3/2015
8.4m (6.7m effective) diameter
primary
Deep individual images, in
ugrizy
9.6 square degree FOV
camera
Large survey footprint
Rapid cadence
2x15s exposures
2 visits per night
Return every ~4 nights
Science drivers to design
4
3.5 degrees
(Full moon is 0.5 degrees)
LSST FOV

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u
g
r
i
z
y

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# visits
70 100 230 230 200 200

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m5 depth
23.9 25.0 24.7 24.0 23.3 22.1

XXIX IAU - Honolulu - 8/3/2015
5
LSST data processing - a complete survey project
Nightly Operations :
Each 15s exposure =
6.44 GB (raw)
2x15s = 1 visit,
800 visits/night.
Release “Alerts” within
60 seconds
(~10
6
per night)
Daily Operations:
Moving Object
Processing.
Transfer 15 TB/night of
image data to US.
At Data Archive:
Yearly reprocessing of all data,
Generates calibrated, query-able catalogs:
+20 PB end of 10 years
Generates processed images:
+50 PB end of 10 years
Start of operations: 2022
End of operations: 2032

XXIX IAU - Honolulu - 8/3/2015
5
LSST data processing - a complete survey project
Nightly Operations :
Each 15s exposure =
6.44 GB (raw)
2x15s = 1 visit,
800 visits/night.
Release “Alerts” within
60 seconds
(~10
6
per night)
Daily Operations:
Moving Object
Processing.
Transfer 15 TB/night of
image data to US.
At Data Archive:
Yearly reprocessing of all data,
Generates calibrated, query-able catalogs:
+20 PB end of 10 years
Generates processed images:
+50 PB end of 10 years
Start of operations: 2022
End of operations: 2032

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See Mario Juric’s talk tomorrow!

XXIX IAU - Honolulu - 8/3/2015
LSST Performance
6

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Effective Mirror
Diameter

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6.7 m
Field of view
9.6 sq deg
Exposure (‘Visit’) Time 2x15 s /visit
Survey length
10 years
Data rate
~15 TB/night
Sky coverage
~18,000 sq
deg
Site
Cerro Pachon
Filters
ugrizy
Typical seeing
0.7”
Photometric accuracy
10 mmag
Astrometric accuracy
50 mas
Astrometric precision
10 mas
LSST will measure the characteristics of about 10B galaxies
and 10B stars, but it will also open an unprecedented
window on transient and changing phenomena in the night
sky.

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u
g
r
i
z
y

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# visits
70 100 230 230 200 200

Back to top


m5 depth
23.
9

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25.
0

Back to top


24.7 24.0 23.3 22.1

XXIX IAU - Honolulu - 8/3/2015
LSST Performance
6

Back to top


Effective Mirror
Diameter

Back to top


6.7 m
Field of view
9.6 sq deg
Exposure (‘Visit’) Time 2x15 s /visit
Survey length
10 years
Data rate
~15 TB/night
Sky coverage
~18,000 sq
deg
Site
Cerro Pachon
Filters
ugrizy
Typical seeing
0.7”
Photometric accuracy
10 mmag
Astrometric accuracy
50 mas
Astrometric precision
10 mas
LSST will measure the characteristics of about 10B galaxies
and 10B stars, but it will also open an unprecedented
window on transient and changing phenomena in the night
sky.

Back to top


u
g
r
i
z
y

Back to top


# visits
70 100 230 230 200 200

Back to top


m5 depth
23.
9

Back to top


25.
0

Back to top


24.7 24.0 23.3 22.1

XXIX IAU - Honolulu - 8/3/2015
7
Detecting moving objects
LSST will detect and
link the detections of
millions of small moving
objects across the Solar
System, 10-100x more
than currently known.

XXIX IAU - Honolulu - 8/3/2015
7
Detecting moving objects
LSST will detect and
link the detections of
millions of small moving
objects across the Solar
System, 10-100x more
than currently known.

XXIX IAU - Honolulu - 8/3/2015
Planetary science & LSST
8

Back to top


Currently
Known*

Back to top


LSST

Back to top


Discoveries**
Median number
of observations
+
Observational
arc length
+

Back to top


Near Earth Objects
(NEOs)
12,832
100,000
(D>250m) 60
6.0 years

Back to top


Main Belt Asteroids
(MBAs)
636,499
5,500,000 (D>500m) 200
8.5 years
Jupiter Trojans
6,387
280,000
(D>2km) 300
8.7 years

Back to top


TransNeptunian Objects

Back to top


(TNOs) + Scattered Disk

Back to top


Objects (SDOS)
1,921
40,000
(D>200km) 450
8.5 years
Plus: comets, irregular satellites, Earth minimoons and temporary satellites ..

Back to top


10-100x increase in sample size for every

Back to top


small body population in the Solar System
* As reported by the MPC ** Expected by end of survey
+
For the brightest objects (near 100% completeness)

XXIX IAU - Honolulu - 8/3/2015
Planetary migration
Nice model
Slow migration of giant
planets
Planetesimal formation
Collisional evolution
Distribution of primordial
material
More ‘test particles’ = much
stronger constraints on
these models
Formation and evolution of the Solar System
9
Nice model - giant planet migration
(movie credit: Hal Levison, SwRI)

XXIX IAU - Honolulu - 8/3/2015
Planetary migration
Nice model
Slow migration of giant
planets
Planetesimal formation
Collisional evolution
Distribution of primordial
material
More ‘test particles’ = much
stronger constraints on
these models
Formation and evolution of the Solar System
9
Nice model - giant planet migration
(movie credit: Hal Levison, SwRI)

XXIX IAU - Honolulu - 8/3/2015
10
Collisional history and size distribution
or axis vs. inclination: color-coded using optical
Color-coded with
SDSS optical
colors
Main belt asteroids
detected in the Sloan
Digital Sky Survey
(SDSS), color coded
according to their
observed colors —
88,000 MBAs
(Parker et al 2008)

Back to top


Identify families, see
compositional trends,
determine size

Back to top


distribution -
understand collisional
history of asteroids.
With LSST - 50x better
resolution

XXIX IAU - Honolulu - 8/3/2015
10
Collisional history and size distribution
or axis vs. inclination: color-coded using optical
Color-coded with
SDSS optical
colors
Main belt asteroids
detected in the Sloan
Digital Sky Survey
(SDSS), color coded
according to their
observed colors —
88,000 MBAs
(Parker et al 2008)

Back to top


Identify families, see
compositional trends,
determine size

Back to top


distribution -
understand collisional
history of asteroids.
With LSST - 50x better
resolution
5.4 The Main Belt: Collisional Families and Size Distributions
Illustration of the decomposition of the Main Belt asteroid population into families and background
Parker et al. 2008
). The top three panels show the

XXIX IAU - Honolulu - 8/3/2015
Sparse lightcurve
inversion can
provide shapes for
10,000-100,000
NEOs and MBAs
Learn about
physical
properties, help us
understand effect
of non-
gravitational forces
Lightcurves, spin periods, and shapes

XXIX IAU - Honolulu - 8/3/2015
Surface activity can be due to collisions or outbursts
Outbursts let us learn about physical properties,
collisions tell us about the size distribution of very
small objects
12
Outbursts and collisional activity

XXIX IAU - Honolulu - 8/3/2015
Retrograde objects
Families of small objects
Active asteroids
Trojans (Neptune, Uranus, Mars, Earth)
Earth mini-moons
Objects with extreme colors (space weathering,
composition)
Binaries (not so rare, but better sampling)
10-100x more asteroids, with photometry accurate
to 10mmag, astrometry accurate to 50mas, and
100’s of measurements in multiple colors
Rare and unusual objects
13

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