Finally, I identified an asteroid
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by Budgieye moderator
Using c_cld's post as a check, I finally got one. Finally..... I think I was using too small a search area for my previous searches.
[ EDIT: it seems that I didn't get the same one that c_cld got. Oh well. Will try again]
NASA: Small Body Identification http://ssd.jpl.nasa.gov/sbfind.cgi This tool provides a list of small-bodies only (asteroids and/or comets) which are likely contained in the specified field on the specified date/time.
Asteroid description http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007 MB24
Date of green image mjd_r 5.29091759E4 or 52909.1759
Modified Julian Date converter http://pdc.ro.nu/mjd.cgi
EDIT I have deleted the rest of this post because I got the date wrong.
Posted
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by Budgieye moderator
Trying to find the same as c-cld found. These asteroids are slippery objects!
asteroid 22771 (1999 CU3) Classification: Apollo [NEO] mjd_r 5.29091759E4 2003-9-27:4:13:16.598
EDIT: I have deleted the rest of the post because I got the date wrong.
Posted
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by c_cld
Ephemeris / WWW_USER Pasadena, USA / Horizons
Target body name: 22771 (1999 CU3) {source: JPL#359}
Center body name: Earth (399) {source: DE431}
Center-site name: Apache Pt.-Sloan Digital Sky Survey
Start time : A.D. 2003-Sep-27 04:13:00.0000 UT
Stop time : A.D. 2003-Sep-27 04:21:00.0000 UT
Step-size : 2 minutes
Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC APmag delta deldot S-O-T /r S-T-O
$$SOE
2003-Sep-27 04:13 23 00 37.60 +64 02 30.5 14.15 0.10565491478584 11.7733133 115.9952 /T 58.8321
2003-Sep-27 04:15 23 00 38.00 +64 02 16.1 14.15 0.10566435899078 11.7753481 115.9996 /T 58.8275
2003-Sep-27 04:17 23 00 38.39 +64 02 01.7 14.15 0.10567380482995 11.7773881 116.0039 /T 58.8229
2003-Sep-27 04:19 23 00 38.79 +64 01 47.3 14.15 0.10568325230753 11.7794333 116.0083 /T 58.8184
2003-Sep-27 04:21 23 00 39.18 +64 01 32.8 14.15 0.10569270142761 11.7814836 116.0126 /T 58.8138
$$EOE
Posted
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rrrrrrHAAAAAA what the....
2003-09-27 04:13 UT
Observer Location [change] : Apache Point-Sloan Digital Sky Survey [645] ( 254°10'45.9''E, 32°46'49.8''N, 2791.2 m )
Search Region [change] : Center at (R.A.=23:00:37, Dec.=64 02 34 J2000), Width=(0:06 x 0 06) dms
Observer Constraints [change] : Require Mag. Param's.=yes, Two-Pass=yes, Max. Output=20
Number of objects found: 1***************** SBFIND v2.7-linF95 2016-Apr-22 13:19:54 *****************
Observation Date = 2003-Sep-27 04:12:59 (2452909.675694 UT)
Location = Apache Pt.-Sloan Digital Sky Survey
Center R.A., Dec. = 23:00:37, +64 02'34" (J2000)
Offsets (+/-) = 00:06:00, +00 06'00"
Magnitude Limit = (none)
Magnitude Req. = true
Requested Group = all asteroids and cometsJ2000 Dist. from Center R.A. Dec. R.A. Dec. Norm Vmag
IAU# Object Name hh:mm:ss.ss +dd mm'ss.s" (s) (") (")
2015 CC14 22:56:29.35 +64 01'57.7" -248. -36.3 3715. 21.6
- "Vmag" is the estimated visual magnitude (n.a. = not available).
For comets, tailing "N"=nuclear and "T"=total magnitude.
2015 CC14 Amor [NEO]
http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2015 CC14
Seriously confused now, what is wrong with the query in the JPL SSD?
@c_cld: would you be so kind to post the complete SQL query code for mjdtoGMT from field?
Thanks
Posted
- "Vmag" is the estimated visual magnitude (n.a. = not available).
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2003-09-27 04:13 UT
Observer Location [change] : Apache Point-Sloan Digital Sky Survey [645] ( 254°10'45.9''E, 32°46'49.8''N, 2791.2 m )
Search Region [change] : Center at (R.A.=23:00:37.5, Dec.=64 02 33.86), Width=(0:30 x 0 30) dms
Observer Constraints [change] : Require Mag. Param's.=yes, Two-Pass=yes, Max. Output=20
Number of objects found: 4***************** SBFIND v2.7-linF95 2016-Apr-22 14:33:33 *****************
Observation Date = 2003-Sep-27 04:12:59 (2452909.675694 UT)
Location = Apache Pt.-Sloan Digital Sky Survey
Center R.A., Dec. = 23:00:38, +64 02'34" (Apparent)
Offsets (+/-) = 00:30:00, +00 30'00"
Magnitude Limit = (none)
Magnitude Req. = true
Requested Group = all asteroids and cometsApparent Dist. from Center R.A. Dec. R.A. Dec. Norm Vmag
IAU# Object Name hh:mm:ss.ss +dd mm'ss.s" (s) (") (")
22771 1999 CU3 23:00:47.63 +64 03'45.1" 10.1 71.2 167.8 14.1 2007 LS19 23:23:44.17 +64 01'33.8" 1.E3 -60.1 2.1E4 23.5 2014 YH44 23:18:16.76 +64 21'27.1" 1.E3 1.E3 1.6E4 21.5 2015 CC14 22:56:39.28 +64 03'12.1" -238. 38.3 3574. 21.6
So with a wider search area (00:30 00 30) i get an asteroid that is closer to the give date, time and RA dec as center than with a smaller search area....
Nuts.
Posted
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by Budgieye moderator
Congratulations Ghost_Sheep_SWR '
I must use the Gregorian calendar --- which I should have known!
Calendar Conversion tool http://pdc.ro.nu/mjd.cgi
2003 09 27 at 4:13
c-cld's date and time
5.29091759E4
2003-9-27 4:13 16.598
Ok, now I've got the date correct.
SB Identification
This tool provides a list of small-bodies only (asteroids and/or comets) which are likely contained in the specified field on the specified date/time.
Current SettingsObservation Time [change] : 2003-09-27 04:13 UT
Observer Location [change] : Apache Point-Sloan Digital Sky Survey [645] ( 254°10'45.9''E, 32°46'49.8''N, 2791.2 m )
Search Region [change] : Center at (R.A.=23:00:37, Dec.=64 02 34), Width=(00:30:00 x 00 30 00) dms
Observer Constraints [change] : Mag. Limit=20, Require Mag. Param's.=yes, Max. Output=20
Number of objects found: 23 ( showing only first 20 )
***************** SBFIND v2.7-linF95 2016-Apr-23 01:06:27 *****************
Observation Date = 2003-Sep-27 04:12:59 (2452909.675694 UT)
Location = Apache Pt.-Sloan Digital Sky Survey
Center R.A., Dec. = 23:00:37, +64 02'34" (Apparent)
Offsets (+/-) = 00:30:00, +00 30'00"
Magnitude Limit = 20.0
Magnitude Req. = true
Requested Group = all asteroids and cometsApparent Dist. from Center Est. Errors R.A. Dec. R.A. Dec. Norm Vmag R.A. Dec.
IAU# Object Name hh:mm:ss +dd mm'ss" (s) (") (") (s) (")
20826 2000 UV13 01:04:47 +35 02'51" 7.E3 -1.E5 1.5E5 19.5 8332. 1.2E5 22771 1999 CU3 22:00:57 +62 13'36" -4.E3 -7.E3 5.4E4 14.0 2027. 3.0E4 101430 1998 VE32 22:22:24 +61 12'51" -2.E3 -1.E4 3.6E4 16.3 647.6 9714. 137924 2000 BD19 11:28:19 +03 41'58" -4.E4 -2.E5 6.6E5 18.3 6.2E4 9.3E5 143637 2003 LP6 12:26:26 +13 36'02" -4.E4 -2.E5 6.0E5 19.2 7.2E4 1.1E6 225416 1999 YC 04:25:41 -41 37'45" 2.E4 -4.E5 4.8E5 19.4 3.3E4 5.0E5 306517 1999 WY 23:26:14 +64 56'33" 2.E3 3.E3 2.3E4 16.3 1040. 1.6E4 374158 2004 UL 22:51:59 -61 54'34" -518. -5.E5 4.5E5 19.8 1.5E5 2.2E6 1991 TB2 12:43:34 -08 07'08" -4.E4 -3.E5 6.1E5 17.9 3.8E4 5.7E5 2012 WA25 00:02:54 +55 46'04" 4.E3 -3.E4 6.3E4 19.4 3095. 4.6E4 1927 LA 00:54:21 +05 38'36" 7.E3 -2.E5 2.3E5 17.1 2.4E5 3.6E6 1939 RR 18:22:16 -29 49'17" -2.E4 -3.E5 4.2E5 17.3 1.3E5 2.0E6 1942 RH 21:57:36 -07 00'35" -4.E3 -3.E5 2.6E5 16.2 9.4E4 1.4E6 1981 EO47 01:40:17 +06 11'22" 1.E4 -2.E5 2.5E5 18.0 1.6E4 2.4E5 2012 US136 12:16:18 -07 45'02" -4.E4 -3.E5 6.3E5 16.6 2.0E5 2.9E6 2013 LH25 07:53:28 -10 15'00" 3.E4 -3.E5 5.5E5 19.4 6.1E4 9.2E5 2014 MS17 00:24:45 +64 46'18" 5.E3 3.E3 7.6E4 19.1 5094. 7.6E4 1168 T-2 22:33:01 -14 57'18" -2.E3 -3.E5 2.9E5 19.9 3.0E4 4.5E5 2P (Encke) 02:28:39 +33 47'54" 1.E4 -1.E5 2.2E5 19.8 1.9E4 2.9E5 322P (SOHO) 12:25:53 -04 06'04" -4.E4 -2.E5 6.2E5 17.5 1.3E5 1.9E6
Well, now I have the asteroid to be second on the list. But why are there so many objects from so many places?
It worked this time, I just listed one asteroid, and the correct one this time.
I'm not sure what was different. Something in the widths parameters
I used w00:30:00 and w00 30 00
Input
Width=(00:30:00 x 00 30 00) dms before
Width=(00:30:00 x 00 30 00) dms correct
Output
Offsets (+/-) = 00:30:00, +00 30'00" before
Offsets (+/-) = 00:30:00, +00 30'00" correct
I can't see any difference.
Current Settings
Observation Time [change] : 2003-09-27 04:13 UT
Observer Location [change] : Apache Point-Sloan Digital Sky Survey [645] ( 254°10'45.9''E, 32°46'49.8''N, 2791.2 m )
Search Region [change] : Center at (R.A.=23:00:37, Dec.=64 02 34), Width=(00:30:00 x 00 30 00) dms
Observer Constraints [change] : Mag. Limit=20, Require Mag. Param's.=yes, Two-Pass=yes, Max. Output=20
Number of objects found: 1
***************** SBFIND v2.7-linF95 2016-Apr-23 01:46:29 *****************
Observation Date = 2003-Sep-27 04:12:59 (2452909.675694 UT)
Location = Apache Pt.-Sloan Digital Sky Survey
Center R.A., Dec. = 23:00:37, +64 02'34" (Apparent)
Offsets (+/-) = 00:30:00, +00 30'00"Magnitude Limit = 20.0
Magnitude Req. = true
Requested Group = all asteroids and comets
Apparent Dist. from Center R.A. Dec. R.A. Dec. Norm Vmag
IAU# Object Name hh:mm:ss.ss +dd mm'ss.s" (s) (") (")
22771 1999 CU3 23:00:47.63 +64 03'45.1" 10.6 71.1 174.6 14.1
Well that took a long time. I am obviously not talented at this. If I have so much trouble with a bright one, I'll have trouble with the dim ones.
The calendar lesson
While any event in recorded human history can be written as a positive
Julian day number, when working with contemporary events all those
digits can be cumbersome. A Modified Julian Day (MJD) is created by
subtracting 2400000.5 from a Julian day number, and thus represents
the number of days elapsed since midnight (00:00) Universal Time on
November 17, 1858. Modified Julian Days are widely used to specify the
epoch in tables of orbital elements of artificial Earth satellites.
Since no such objects existed prior to October 4, 1957, all
satellite-related MJDs are positive.https://www.fourmilab.ch/documents/calendar/
The History Lesson
(Julian calendar to Gregorian calendar "Give us our Eleven Days" https://en.wikipedia.org/wiki/Calendar_(New_Style)_Act_1750
Posted
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by c_cld in response to Ghost_Sheep_SWR's comment.
My query was complete:
Your SQL command was:
select dbo.fMjdToGMT(mjd_r) from field where fieldID=1237663231227854848
2003-9-27:4:13:16.598053
You could use also SDSS Object ID
Your SQL command was:
select p.objid, f.mjd_r, dbo.fMjdToGMT(f.mjd_r) as dateobs from phototag p join field f on p.fieldid=f.fieldid where objID=1237663231227855407
objid mjd_r dateobs
1237663231227855407 52909.1758865599 2003-9-27:4:13:16.598053
Posted
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by c_cld in response to Ghost_Sheep_SWR's comment.
22771 1999 CU3
http://classic.sdss.org/dr3/instruments/index.html "each object has one image in each filter, taken at 71.7 second intervals"
~45arcsec track in 71.7*4(r,i,u,z)+54(g) seconds =340.8s = ~5mn41s
Posted
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by Budgieye moderator
Pretty image, c_cld! The asteroid is going south, unlike the usual asteroid that goes E or W. So I assume it passed beneath (over?) the south pole at a distance of approximately 10 million miles in 2003.
date ...............distance in Astronomical Units AU
2001-Sep-25 11:17 Earth 0.11
2003-Sep-17 14:42 Earth 0.06
2005-Sep-03 18:37 Earth 0.14
2007-Aug-14 08:16 Earth 0.22 2007-Jul-21 08:46 Venus 0.140
2009-Jul-22 23:52 Earth 0.28
2011-Jul-02 10:29 Earth 0.30
2013-Jun-08 22:49 Earth 0.29
2015-May-07 19:54 Earth 0.24
2017-Apr-19 15:26 Earth 0.16
from http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=22771;old=0;orb=0;cov=0;log=0;cad=1#cad
Posted
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by Ghost_Sheep_SWR in response to c_cld's comment.
Thanks c_cld!
By the way, can you tell the difference in the query from Budgieye? I really don't see any difference, a bit worrysome if you want to know how to get the right results.
Well succes at last Budgieye 😃 , this is more complicated than i imagined it to be
EDIT
Great it worked 😃 (visually works better for me)
2003-9-27:4:13:16.598053
Posted
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by c_cld in response to Budgieye's comment.
So I assume it passed beneath (over?) the south pole at a distance of approximately 10 million miles in 2003.
No, declination is positive, that's above the celestial equator .
Ephemeris were
Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC APmag
2003-Aug-23 04:13 11 34 04.72 -09 37 28.0 20.
2003-Aug-28 04:13 11 38 12.48 -06 50 35.6 21.
2003-Sep-02 04:13 m 11 42 09.46 -01 44 11.1 23.
2003-Sep-07 04:13 m 11 46 49.99 +07 43 23.6 26. Ned Output: Ecliptic J2000.0 longitude 31.05349557 latitude 60.40342057 (north of ecliptic)
2003-Sep-12 04:13 m 11 54 50.15 +26 09 49.7 21.
2003-Sep-17 04:13 12 20 01.14 +59 06 59.5 15.61
2003-Sep-22 04:13 20 28 17.32 +83 01 12.4 14.10
2003-Sep-27 04:13 23 00 37.60 +64 02 30.5 14.15
2003-Oct-02 04:13 m 23 16 47.21 +52 51 08.6 14.51
2003-Oct-07 04:13 m 23 23 43.61 +45 59 49.0 14.93
so nearly above north earth pole within ~6.056 million miles (Wolfram convert 0.0651529 au (astronomical units) to miles) or 9.75 million km (24 times earth moon distance)
Posted
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by c_cld in response to Ghost_Sheep_SWR's comment.
You could prefer the shortest query
Your SQL command was:
select dbo.fMjdToGMT(52909.1758865599) or select dbo.fMjdToGMT(5.29091758865599E4)2003-9-27:4:13:16.598053
Posted
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That's really short&handy for SDSS, works like a charm!
Do you happen to know of a similar SQL command for converting RA,dec Decimal to Hexagesimal units (for DECaLS asteroid identification)?
I now use the Hubble Legacy Archive to convert these for me
http://hla.stsci.edu/hlaview.html
It's a bit of a circumbendibus and slow-down method i think.
Posted
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by c_cld
I'm using mostly
Coordinate Converter: http://heasarc.gsfc.nasa.gov/cgi-bin/Tools/convcoord/convcoord.pl?and sometimes xTime - A Date/Time Conversion Utility http://heasarc.gsfc.nasa.gov/cgi-bin/Tools/xTime/xTime.pl
Posted
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by c_cld
Decimal to sexagesimal
Your SQL command was:
select dbo.fHMS(345.15675) as ra, dbo.fDMS(64.04172) as dec
ra dec
23:00:37.62 +64:02:30.19
Posted
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by Ghost_Sheep_SWR in response to c_cld's comment.
Thanks! Those are very handy 😃
Just having a lot of fun now trying to find objects for the WOW signal, a pair of comets (comets 266P/Christensen and 335P/Gibbs) is regarded as maybe being responsible for the signal. But haven't managed to sqeeze them out of the SSD, it keeps timing out it seems. Maybe someone else manages, (probably with a lower magnitude)?
http://www.space.com/32609-alien-wow-signal-could-soon-be-explained.html
https://en.m.wikipedia.org/wiki/Wow!_signal
Observation Time [change] : 1977-08-15 22:16 UT-5 (EST/CDT)
Observer Location [change] : Perkins Observatory, Delaware [H69] ( 276°56'40.7''E, 40°15'04.4''N, 271.5 m )
Search Region [change] : Center at (R.A.=19:25:31, Dec.=-26 57 00 J2000), Width=(0:05 x 0 05) dms
Observer Constraints [change] : Mag. Limit=17, Require Mag. Param's.=yes, Two-Pass=yes, Max. Output=20
Number of objects found: 1
***************** SBFIND v2.7-linF95 2016-Apr-23 10:04:37 *****************
Observation Date = 1977-Aug-16 03:15:59 (2443371.636111 UT)
Location = Ohio Wesleyan University
Center R.A., Dec. = 19:25:31, -26 57'00" (J2000)
Offsets (+/-) = 00:05:00, +00 05'00"
Magnitude Limit = 17.0
Magnitude Req. = true
Requested Group = all asteroids and cometsJ2000 Dist. from Center R.A. Dec. R.A. Dec. Norm Vmag
IAU# Object Name hh:mm:ss.ss +dd mm'ss.s" (s) (") (")
7409 1990 BS 19:25:52.69 -26 57'52.8" 21.7 -52.8 329.6 16.9
Result
Mai-belt asteroid, center norm (s) 329.6
http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=7409
Posted
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by c_cld
Have a look at https://talk.galaxyzoo.org/#/boards/BGZ0000007/discussions/DGZ0000x5k to check others transients objects 😃
Posted