IPB

Welcome Guest ( Log In | Register )

Interstellar Interlopers, Coming in from the great beyond
Holder of the Tw...
post Oct 27 2017, 01:40 PM
Post #1


Member
***

Group: Members
Posts: 544
Joined: 17-November 05
From: Oklahoma
Member No.: 557



They finally found a chunk of something coming into the Solar System. Something much bigger than cosmic rays or dust particles.

Asteroid/comet in hyperbolic trajectory
Go to the top of the page
 
+Quote Post

Posts in this topic
- Holder of the Two Leashes   Interstellar Interlopers   Oct 27 2017, 01:40 PM
- - Gladstoner   The estimated eccentricity of 1.19 (per Wikipedia)...   Oct 27 2017, 06:47 PM
|- - fredk   QUOTE (Gladstoner @ Oct 27 2017, 07:47 PM...   Oct 27 2017, 07:05 PM
- - Paolo   I was surprised at first by the "low" ec...   Oct 27 2017, 07:04 PM
- - Paolo   the error bar for eccentricity is actually quite s...   Oct 27 2017, 07:13 PM
- - fredk   Thanks for that reference, Paolo. Still, there ha...   Oct 27 2017, 07:32 PM
|- - Holder of the Two Leashes   QUOTE (fredk @ Oct 27 2017, 02:32 PM) Sti...   Oct 27 2017, 09:09 PM
- - Gladstoner   For reference, a list of all 'hyperbolic' ...   Oct 27 2017, 07:51 PM
- - Paolo   many of these articles were written before a secon...   Oct 28 2017, 05:16 AM
- - JRehling   The challenges are obvious, but it would be nice t...   Oct 28 2017, 09:48 PM
|- - TheAnt   QUOTE (JRehling @ Oct 28 2017, 11:48 PM) ...   Oct 28 2017, 10:46 PM
- - Gladstoner   I recall reading several years ago about a year-ro...   Oct 28 2017, 11:12 PM
- - JohnVV   using the HORIZONS telnet ( yes telnet from the 70...   Oct 28 2017, 11:58 PM
|- - JRehling   TheAnt, Truly reaching this object will be quite ...   Oct 30 2017, 12:48 AM
|- - TheAnt   QUOTE (JRehling @ Oct 30 2017, 01:48 AM) ...   Oct 30 2017, 03:08 PM
|- - Gladstoner   QUOTE (TheAnt @ Oct 30 2017, 10:08 AM) Af...   Oct 30 2017, 03:36 PM
|- - HSchirmer   QUOTE (TheAnt @ Oct 30 2017, 04:08 PM) I ...   Oct 30 2017, 06:07 PM
|- - TheAnt   QUOTE (HSchirmer @ Oct 30 2017, 07:07 PM)...   Oct 30 2017, 07:47 PM
|- - HSchirmer   QUOTE (TheAnt @ Oct 30 2017, 08:47 PM) I ...   Oct 30 2017, 10:13 PM
- - Gladstoner   Path of approach of A/2017 U1 plotted in Voyager I...   Oct 30 2017, 05:40 AM
- - Gladstoner   I gather that it would be prudent to give this reg...   Oct 30 2017, 05:46 AM
- - Paolo   that was fast! Palomar Optical Spectrum of Hy...   Oct 30 2017, 05:52 AM
- - Floyd   QUOTE (Gladstoner @ Oct 30 2017, 01:40 AM...   Oct 30 2017, 11:55 AM
|- - Ames   QUOTE (Floyd @ Oct 30 2017, 11:55 AM) The...   Oct 30 2017, 12:42 PM
- - Explorer1   If only it had been noticed earlier, before closes...   Oct 30 2017, 05:54 PM
- - fredk   It just depends on the velocity distribution of in...   Oct 30 2017, 10:36 PM
- - ngunn   I'd like to know the miss distance of its appr...   Oct 31 2017, 12:21 AM
|- - HSchirmer   QUOTE (ngunn @ Oct 31 2017, 01:21 AM) I...   Oct 31 2017, 07:08 PM
|- - Paolo   QUOTE (HSchirmer @ Oct 31 2017, 08:08 PM)...   Nov 1 2017, 06:49 AM
- - fredk   That's called the impact parameter. It's ...   Oct 31 2017, 12:46 AM
|- - JRehling   I think the two most important kinds of scrutiny f...   Oct 31 2017, 06:25 PM
|- - Gerald   QUOTE (JRehling @ Oct 31 2017, 08:25 PM) ...   Nov 1 2017, 08:02 PM
- - Phil Stooke   I'm afraid that's not quite how it works. ...   Oct 31 2017, 07:25 PM
- - fredk   The sun also doesn't help. The slingshot mech...   Oct 31 2017, 07:45 PM
|- - HSchirmer   QUOTE (fredk @ Oct 31 2017, 08:45 PM) The...   Oct 31 2017, 08:26 PM
- - fredk   For the sun, the outgoing speed will clearly be th...   Oct 31 2017, 09:58 PM
- - Paolo   and a second arXiv paper: Kinematics of the Inters...   Nov 1 2017, 07:05 AM
- - nprev   Going back to the object itself, interesting that ...   Nov 1 2017, 11:39 PM
|- - Gladstoner   QUOTE (nprev @ Nov 1 2017, 05:39 PM) Goin...   Nov 2 2017, 12:20 AM
- - Gerald   You'll probably need an environment, where lig...   Nov 2 2017, 02:10 AM
- - Gladstoner   Are there asteroids in the inner solar system with...   Nov 2 2017, 04:12 AM
- - Gerald   A coating of a few microns of a pigment like tholi...   Nov 2 2017, 10:37 AM
|- - JRehling   A/2017 U1 had no observed coma, so it had little i...   Nov 2 2017, 03:18 PM
||- - HSchirmer   QUOTE (JRehling @ Nov 2 2017, 04:18 PM) A...   Dec 19 2017, 02:20 AM
|- - nprev   QUOTE (Gerald @ Nov 2 2017, 02:37 AM) Ama...   Nov 3 2017, 08:14 AM
- - fredk   Makes me wonder about capture: some extremely smal...   Nov 2 2017, 04:48 PM
- - Gladstoner   It has been hypothesized that comet 96P/Machholz c...   Nov 2 2017, 05:04 PM
- - Gerald   I wouldn't call the ejection of a small Jovian...   Nov 3 2017, 11:48 AM
- - Paolo   I suspect that the xenoasteroid's redness has ...   Nov 3 2017, 03:24 PM
|- - HSchirmer   QUOTE (Paolo @ Nov 3 2017, 03:24 PM) I su...   Nov 3 2017, 10:48 PM
- - nprev   Pity we'll never get a high-res image of it. I...   Nov 3 2017, 07:56 PM
- - Gerald   I wonder, how this observation of an extrasolar as...   Nov 3 2017, 11:28 PM
|- - HSchirmer   QUOTE (Gerald @ Nov 4 2017, 12:28 AM) So,...   Nov 4 2017, 11:21 PM
- - Paolo   IIRC interstellar grains are mostly supposed to fo...   Nov 4 2017, 06:32 AM
|- - Paolo   QUOTE (Paolo @ Nov 4 2017, 07:32 AM) I re...   Nov 25 2017, 04:22 PM
- - Gerald   The paper I mentioned above says at the end of pag...   Nov 4 2017, 08:50 AM
|- - JRehling   In our solar system, small (asteroid) and very sma...   Nov 7 2017, 04:43 PM
- - Paolo   a new naming convention for interstellar objects: ...   Nov 7 2017, 09:09 AM
- - stevesliva   You omitted the 1, which when you get down to thin...   Nov 7 2017, 02:19 PM
- - Paolo   a good update on what's known about 'Oumua...   Nov 12 2017, 07:39 AM
|- - HSchirmer   QUOTE (Paolo @ Nov 12 2017, 07:39 AM) a g...   Nov 12 2017, 01:33 PM
- - djellison   The spacecraft would not have survived the trip. ...   Nov 12 2017, 03:31 PM
- - hendric   With all the hot Jupiters we've discovered, I ...   Nov 13 2017, 04:36 PM
|- - JRehling   Hot Jupiters are relatively rare. We discovered so...   Nov 14 2017, 04:31 PM
- - Hungry4info   With as deep in their star's gravitational wel...   Nov 13 2017, 04:55 PM
|- - HSchirmer   QUOTE (Hungry4info @ Nov 13 2017, 05:55 P...   Nov 13 2017, 06:40 PM
- - hendric   Well, my assumption was that the source solar syst...   Nov 13 2017, 07:59 PM
- - fredk   Here's a twist - a paper looking at the possib...   Nov 17 2017, 03:37 PM
- - nprev   Well...at least it's a testable hypothesis if ...   Nov 18 2017, 07:09 AM
- - dudley   Examination of the light curve of Oumuamua as it r...   Nov 18 2017, 04:10 PM
|- - TheAnt   QUOTE (dudley @ Nov 18 2017, 05:10 PM) Ex...   Nov 18 2017, 04:21 PM
|- - Explorer1   QUOTE (dudley @ Nov 18 2017, 11:10 AM) Ex...   Nov 18 2017, 05:18 PM
|- - dudley   QUOTE (Explorer1 @ Nov 18 2017, 05:18 PM)...   Nov 18 2017, 06:14 PM
- - fredk   It's not entirely clear what Occam would say a...   Nov 18 2017, 05:34 PM
- - Ron Hobbs   ESO has a press release out today with an artist...   Nov 20 2017, 06:00 PM
- - Gerald   Possibly a collision fragment. But figures of equi...   Nov 20 2017, 09:34 PM
- - dudley   The differences in reflectivity, through the cours...   Nov 20 2017, 11:11 PM
- - fredk   It's worth pointing out that the lightcurve br...   Nov 21 2017, 01:06 AM
- - dudley   The linked article is a few days old, so has the o...   Nov 21 2017, 02:31 AM
- - fredk   You can read in the original Nature paper linked i...   Nov 21 2017, 05:26 AM
- - Floyd   There must be Psyche-like bodies in other systems....   Nov 21 2017, 01:36 PM
- - Explorer1   Have we confirmed (from any 'precovery images...   Nov 22 2017, 12:17 AM
- - dudley   The trend in thinking about this object now, is th...   Nov 22 2017, 03:22 AM
- - TheAnt   So we have to accept that 1I/2017 U1 truly have on...   Nov 22 2017, 03:20 PM
|- - dudley   QUOTE (TheAnt @ Nov 22 2017, 04:20 PM) So...   Nov 22 2017, 08:15 PM
|- - TheAnt   QUOTE (dudley @ Nov 22 2017, 09:15 PM) A ...   Nov 23 2017, 11:20 PM
- - Ron Hobbs   The artwork from M. Kornmesser at ESO is the APOD ...   Nov 22 2017, 05:16 PM
- - Gladstoner   Objects in our solar system have been subjected to...   Nov 23 2017, 12:03 AM
- - dudley   Perhaps Oumuamua was ejected from its home system ...   Nov 23 2017, 02:16 AM
|- - Gladstoner   QUOTE (dudley @ Nov 22 2017, 08:16 PM) Sh...   Nov 23 2017, 06:36 AM
- - Gerald   As far as I understood, any detectable cometary ac...   Nov 23 2017, 03:04 PM
- - nprev   ADMIN NOTE: Two posts in violation of rule 1.3 rem...   Nov 23 2017, 04:38 PM
- - dudley   The length of Oumuamua was first given as 180, and...   Nov 24 2017, 06:40 PM
- - nprev   I haven't seen error bars for any of these mea...   Nov 24 2017, 07:21 PM
- - fredk   Adding to nprev's comments, the lightcurve onl...   Nov 24 2017, 09:09 PM
|- - JRehling   In real estate, the three most important things ar...   Nov 25 2017, 07:08 AM
- - Floyd   Excellent point on multiple rounds of exceptional ...   Nov 25 2017, 02:09 PM
- - Gerald   This seems to be within the possible scenarios on ...   Dec 19 2017, 09:56 AM
|- - JRehling   It seems like the number of possible hypotheses is...   Dec 20 2017, 04:25 AM
- - nprev   We've got evidence that many systems have plan...   Dec 20 2017, 05:41 AM
2 Pages V   1 2 >


Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 31st October 2024 - 11:35 PM
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.