IPB

Welcome Guest ( Log In | Register )

15 Pages V   1 2 3 > »   
Reply to this topicStart new topic
Asteroid approach, Science operations begin!
Holder of the Tw...
post Aug 24 2018, 06:48 PM
Post #1


Member
***

Group: Members
Posts: 540
Joined: 17-November 05
From: Oklahoma
Member No.: 557



NASA update on the OSIRIS-REx mission, includes first picture of the asteroid from the spacecraft.

Begins Operations
Go to the top of the page
 
+Quote Post
B Bernatchez
post Oct 6 2018, 10:33 PM
Post #2


Junior Member
**

Group: Members
Posts: 51
Joined: 31-December 10
From: Earth
Member No.: 5589



First Approach Maneuver completed:

https://www.asteroidmission.org/?latest-new...proach-maneuver

Go to the top of the page
 
+Quote Post
Explorer1
post Oct 19 2018, 02:12 PM
Post #3


Senior Member
****

Group: Members
Posts: 2073
Joined: 13-February 10
From: Ontario
Member No.: 5221



New images! (they will be leaving the '8-bit' phase pretty soon)

https://www.asteroidmission.org/bennu-oct-2018-pixel-zoom/
Go to the top of the page
 
+Quote Post
mcaplinger
post Oct 19 2018, 04:16 PM
Post #4


Senior Member
****

Group: Members
Posts: 2502
Joined: 13-September 05
Member No.: 497



QUOTE (Explorer1 @ Oct 19 2018, 06:12 AM) *

When I first read this I assumed that there was an error in the captions: at a little under 10,000 km range Bennu is only 3.7 pixels in Polycam? But it's true, and that just goes to show how dinky Bennu is. Polycam's IFOV is 13.5 urad so at range R Bennu (246 meters mean radius) subtends 0.246*2/(R*13.5e-6) pixels.


--------------------
Disclaimer: This post is based on public information only. Any opinions are my own.
Go to the top of the page
 
+Quote Post
Explorer1
post Oct 24 2018, 08:03 PM
Post #5


Senior Member
****

Group: Members
Posts: 2073
Joined: 13-February 10
From: Ontario
Member No.: 5221



https://www.asteroidmission.org/bennu-jupit...exobservations/

New image, plus a comparison with the Jupiter observation from last year to illustrate the albedo difference. Seems like another Ryugu so far....
Go to the top of the page
 
+Quote Post
Hungry4info
post Oct 26 2018, 01:18 AM
Post #6


Senior Member
****

Group: Members
Posts: 1413
Joined: 26-July 08
Member No.: 4270



New rotation movie from 3000 km taken on 23 Oct 2018. We can see surface features, even if it's not clear exactly what they are.

https://www.asteroidmission.org/bennu-13px/


--------------------
-- Hungry4info (Sirius_Alpha)
Go to the top of the page
 
+Quote Post
Phil Stooke
post Oct 26 2018, 05:37 AM
Post #7


Solar System Cartographer
****

Group: Members
Posts: 10122
Joined: 5-April 05
From: Canada
Member No.: 227



These are the 3 frames in that short movie, a bit processed. One suggests a crater, maybe bigger (relatively) than any on Ryugu.

Phil

Attached Image


--------------------
... because the Solar System ain't gonna map itself.

Also to be found posting similar content on https://mastodon.social/@PhilStooke
NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain)
Go to the top of the page
 
+Quote Post
Guest_mcmcmc_*
post Oct 29 2018, 01:39 PM
Post #8





Guests






Countdowns:
https://programmi.000webhostapp.com/osiris/...is-counter.html

They are based on odd data: "future telemetries" available as "digital readouts", which always says 00:00 is the time of the maneuvers, and PDF schedule, I don't know where to find better data.
Go to the top of the page
 
+Quote Post
Guest_mcmcmc_*
post Oct 29 2018, 02:39 PM
Post #9





Guests






QUOTE (mcmcmc @ Oct 29 2018, 02:39 PM) *
Countdowns:


Found more rich but less embellished countdowns:
http://www.whereisroadster.com/osiris_rex/
Go to the top of the page
 
+Quote Post
Paolo
post Oct 30 2018, 07:41 PM
Post #10


Senior Member
****

Group: Members
Posts: 1729
Joined: 3-August 06
From: 43° 35' 53" N 1° 26' 35" E
Member No.: 1004



Bennu at 100 Pixels

looking a lot like Ryugu
Go to the top of the page
 
+Quote Post
Phil Stooke
post Oct 30 2018, 09:43 PM
Post #11


Solar System Cartographer
****

Group: Members
Posts: 10122
Joined: 5-April 05
From: Canada
Member No.: 227



One very good thing about this is that I can use exactly the same map projection for Bennu as I used for Ryugu. Only the scale has to change.

Phil


--------------------
... because the Solar System ain't gonna map itself.

Also to be found posting similar content on https://mastodon.social/@PhilStooke
NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain)
Go to the top of the page
 
+Quote Post
Guest_mcmcmc_*
post Oct 31 2018, 01:44 PM
Post #12





Guests






These direct query links to NASA Horizons provide objects distance from the Sun in km:

OSIRIS-Rex
Bennu

Look for "$$SOE" in result; distance in km is value 3 counting from 0.
Resulting current distance between OSIRIS-Rex and Bennu:
2018-Oct-31 14:40 - 236.16 km

It looks quite precise despite the big distance: this method gives 7 km as Hayabusa2-Ryugu distance, which is currently 5 km.
I think the distance is based on light travel time.
Go to the top of the page
 
+Quote Post
mcaplinger
post Oct 31 2018, 04:09 PM
Post #13


Senior Member
****

Group: Members
Posts: 2502
Joined: 13-September 05
Member No.: 497



There are SPICE kernels for Orex at https://naif.jpl.nasa.gov/pub/naif/ORX/kernels/ -- AFAIK this is what the flight team is using.


--------------------
Disclaimer: This post is based on public information only. Any opinions are my own.
Go to the top of the page
 
+Quote Post
Guest_mcmcmc_*
post Oct 31 2018, 04:58 PM
Post #14





Guests






QUOTE (mcaplinger @ Oct 31 2018, 05:09 PM) *
There are SPICE kernels for Orex at https://naif.jpl.nasa.gov/pub/naif/ORX/kernels/ -- AFAIK this is what the flight team is using.

I have no idea of what SPICE kernels are. rolleyes.gif
Go to the top of the page
 
+Quote Post
mcaplinger
post Oct 31 2018, 08:44 PM
Post #15


Senior Member
****

Group: Members
Posts: 2502
Joined: 13-September 05
Member No.: 497



QUOTE (mcmcmc @ Oct 31 2018, 08:58 AM) *
I have no idea of what SPICE kernels are. rolleyes.gif

They are files that capture the position and orientation of spacecraft and solar system bodies, used for mission planning and data analysis. https://naif.jpl.nasa.gov/naif/aboutspice.html

If NASA Horizons does what you want, then by all means use it. I'm not certain how frequently it's updated, however.


--------------------
Disclaimer: This post is based on public information only. Any opinions are my own.
Go to the top of the page
 
+Quote Post

15 Pages V   1 2 3 > » 
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 19th March 2024 - 06:54 AM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member.