Observing Runs Looking for 2011 YS62 from 2015-08-26 to 2015-08-28
When
it comes to target selection there two criteria I use first is would additional
observations be useful, the second is the target in range of the telescope's
capability. To find targets I check one or all of the lists (see below) and see
if the target is range of the telescope's capability (if it is important I will
push the limit of the range) Then I will plan an observing run. Recently I checked the Arecibo Asteroid
Schedule and I saw they had requested optical astrometry for 2011 YS62. At the time this asteroid had a data-arc span
of 89 days and had been unobserved for 1314 days (3.597 years)
First Night
I first did run of 15 - 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27), with no luck,. Next I used Find_Orb to generate new orbital elements with Epoch 2015 Sep 26.0 and did a another run 15. I also used Find_Orb's Monte Carlo function to generate a lot of clones(virtual asteroids) orbital elements and then manually add them to Astrometrica's MPCOrb.dat file. Then I created 3 stacks of 5 images and found a moving object near the known object box of one of the clones. I assigned a temporary designation to the object and submitted night one's observations to the Minor Planet Center.
 |
| Astrometrica object
verification window a stack (1 of 3 First Night
) a stacks 5 - 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
 |
| Astrometrica object
verification window a stack (2 of 3 First Night
) a stacks 5 - 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
 |
| Astrometrica object
verification window a stack (1 of 3 First Night
) a stacks 5 - 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
Second Night
Using Find_Orb I generated two
orbits one was with just night one’s observations, the other with 2011 YS62 and
night one's observations (“updated orbit”) and manually replaced the
"clones" orbital elements. Next I ran a series of 6-120
Second Luminance BIN2 Images on itelescope.net's
(TEL T27) and created a stacks of 5 images and found an object at
the known object box for the "updated orbit". Then I ran a second run of 6 images and created
a stack of 5 and saw that the object was moving. Later on I ran another run of 15 images
and created a 3 more stacks of 5 images. I assigned a (new) temporary
designation to the object and submitted the second night’s observations to
the Minor Planet Center. Shortly thereafter the object was listed on the
NEO Confirmation Page.
 |
| Astrometrica object
verification window a stack (1 of 5 Second Night
) a stacks 5 - 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
 |
| Astrometrica object
verification window a stack (2 of 5 Second Night
) a stacks 5- 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
 |
| Astrometrica object
verification window a stack (3 of 5 Second Night
) a stacks 5- 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
 |
| Astrometrica object
verification window a stack (4 of 5 Second Night
) a stacks 5- 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
 |
| Astrometrica object
verification window a stack (3 of 5 Second Night
) a stacks 5- 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
Third Night
I did the same orbit update has I did the night before then, I obtain 32--120 Second Luminance BIN2 images with itelescope.net's (TEL T27) and created 3 stacks of 10 image and submitted the third night observations to the Minor Planet Center using the designation that was on the NEO Confirmation Page.
 |
| Astrometrica object
verification window a stack (1 of 3 First Night
) a stacks 10 - 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
 |
| Astrometrica object
verification window a stack (2 of 3 First Night
) a stacks 10 - 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
 |
| Astrometrica object
verification window a stack (3 of 3 First Night
) a stacks 10 - 120 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m
f/6.6 CDK astrograph + CCD) at Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) |
On 2015 Sept. 28 the Minor Planet Center issued MPEC 2015-S102:
2011 YS62 with the observations from the three nights of and updated
orbital elements.
Background
(as of 2015-09-30)
- Object: 2011 YS62
- Approximate Diameter: 310 m - 680 m (1017.06 feet to 2230.97 feet) ( Absolute Magnitude: H= 19.7 )
- Orbit Type: Amor
- First Observed was made on: 2011 12 29.15398
- First Observed By: Pan-STARRS 1 (MPC Code F51)
- Assignment of asterisk: Catalina Sky Survey (MPC Code 703) For infomation on how discoverer is defined read MPEC 2010-U20 : EDITORIAL NOTICE
- Last Observed: 2015 09 28.58389
- Data-Arc Span: 1405 days (3.85 yr)
- Number Oppositions :2
- Number of Observations Made: 85
- Next Close-Approach:
Will safely pass Earth on 2015-Nov-2 at Nominal Distance of
0.0914513682160852 AU (35.59(LD)) or 8,500,935.758 miles or (
13,680,929.957 KM)
- On the Goldstone Asteroid Schedule: NO
- On the Arecibo Asteroid Schedule: YES, Dates:
2015
Nov 29 (Request Optical Astrometry: No(It was request before recovery was made), Request Optical
Lightcurve:NO, Request Optical Characterization NO)
Target lists
Other Links
