Update for (49) Pales - January 16/17, 2000
Update computed by Jan Manek; issued 11 Jan 2000 17:03:54 +0100 (CET)
Update computed by Martin Federspiel; issued 4 Jan 2000 23:59:56 +0100 (CET)
Martin Federspiel's update
IOTA/IOTA-ES occultation update for
(49) Pales/TYC 1880 01817 event on 2000 Jan 17
visible from Central Europe and US
Summary
In the night of 2000 Jan 16/17 the 150 km large asteroid (49) Pales
occults the 9.6 mag star TYC 1880 01817 for observers in central
Europe and the US. Romania, Hungary, Austria, southern Germany,
the border between Belgium and France, southwesternmost England,
eastern Canada, Chicago, ..., and the border California/Baja
California are in the path of this rather favourable event.
The updated path is about 0.1" or 1 path width north of
nominal prediction of E. Goffin. Goffin's nominal prediction file has number a00_0110.ps.gz.
The event at one glimpse:
* date and approx. UT time of event: 2000 Jan 17 @ 1h UT
* magnitude of target star: 9.6
* magnitude drop [mag]: 2.2
* estimated maximum duration [s]: 16
* rough path description: Central Europe, US
The occultation path:
* approximate widths [km]: 160
* more detailed path description: Black Sea, Romania, Hungary, Austria,
southern Germany, Luxembourg, border Belgium/France, southwestern
England (Cornwall), southernmost tip of Ireland, eastern Canada,
Lake Michigan, Chicago, Illinois, Iowa, Kansas, New Mexico, Arizona,
border California/Baja California
* uncertainty [path widths]: 0.7
* maps: attached
* remarks: path about 0.1" (1 path width) north of Edwin Goffin's nominal
prediction, no time shift
Data for the target star:
* name: TYC 1880 01817
* constellation: Gemini
* J2000 position [h,m,s; °,',"]: RA 6 35 54.054 DE +23 18 35.08
* position source: TRC (and TYC currently not available to me)
* estimated accuracy ["]: ?
* V mag [mag]: 9.63
* remarks: accuracy assumed to be 0.1"
Data for the minor planet:
* general information:
mumber, name: (49) Pales
approx. diameter [km]: 154
* orbital information
orbit source: calculation Federspiel
source of used astrometry: CAMC, Bordeaux, USNO, TMO
number of used observations: 125
number of rejected observations: several
time covered by the observations: 1985 - 1999 Dec 16
rms residuals ["] (RA,DE): 0.14",0.15"
estimated positional accuracy at epoch of event ["]: 0.07"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 2000 Jan 17 @ 1h 4m 42s
* least geocentric distance ["]: 2.43"
* uncertainty in time [s]: 9
* approx. V mag of minor planet at event [mag]: 11.6
* geocentric parallax of minor planet ["]: 5.10
* magnitude drop [mag]: 2.2
* estimated maximum duration [s]: 16
* apparent motion of minor planet ["/h]: 27.68"/h
* angular distance to moon, phase of moon [°,%]: 40°,77%+
* remarks:
Calculator(s): Martin Federspiel
Path coordinates:
Lat. Long. hh:mm:ss UT StarAlt° StarAzi° SunAlt° SunAzi°
32.68 63.33 0:55: 9. ! 9.4 291.8 -23.6 100.5
36.04 55.14 0:55:31. ! 16.7 287.0 -30.7 94.7
38.28 49.28 0:55:54. ! 21.7 283.2 -35.4 89.8
40.06 44.32 0:56:16. ! 25.8 279.7 -39.1 85.3
41.57 39.85 0:56:38. ! 29.3 276.3 -42.2 80.8
42.87 35.70 0:56:60. ! 32.4 272.9 -44.9 76.3
44.03 31.76 0:57:22. ! 35.2 269.6 -47.2 71.7
45.07 27.97 0:57:44. ! 37.8 266.1 -49.3 67.0
46.00 24.31 0:58: 6. ! 40.2 262.6 -51.2 62.1
46.84 20.73 0:58:28. ! 42.4 259.0 -52.8 57.1
47.60 17.22 0:58:50. ! 44.5 255.3 -54.3 51.9
48.28 13.76 0:59:12. ! 46.5 251.5 -55.5 46.6
48.90 10.35 0:59:34. ! 48.3 247.6 -56.6 41.1
49.45 6.96 0:59:56. ! 50.0 243.5 -57.5 35.5
49.94 3.61 1: 0:19. ! 51.7 239.2 -58.2 29.8
50.37 .28 1: 0:41. ! 53.2 234.8 -58.8 23.9
50.75 -3.03 1: 1: 3. ! 54.6 230.2 -59.2 18.0
51.07 -6.33 1: 1:25. ! 55.8 225.4 -59.4 12.1
51.34 -9.61 1: 1:47. ! 57.0 220.4 -59.5 6.2
51.56 -12.88 1: 2: 9. ! 58.0 215.3 -59.3 .4
51.72 -16.13 1: 2:31. ! 59.0 210.0 -59.1 354.6
51.84 -19.37 1: 2:53. ! 59.7 204.5 -58.7 349.0
51.91 -22.60 1: 3:15. ! 60.4 198.8 -58.2 343.5
51.93 -25.82 1: 3:37. ! 60.9 193.1 -57.5 338.1
51.90 -29.02 1: 3:59. ! 61.3 187.2 -56.8 333.0
51.83 -32.21 1: 4:22. ! 61.5 181.3 -55.9 328.0
51.71 -35.38 1: 4:44. ! 61.6 175.4 -54.9 323.2
51.54 -38.54 1: 5: 6. ! 61.5 169.5 -53.8 318.6
51.33 -41.68 1: 5:28. ! 61.2 163.6 -52.7 314.1
51.07 -44.81 1: 5:50. ! 60.8 157.8 -51.4 309.9
50.77 -47.92 1: 6:12. ! 60.3 152.2 -50.1 305.8
50.43 -51.02 1: 6:34. ! 59.6 146.7 -48.7 301.9
50.03 -54.11 1: 6:56. ! 58.8 141.4 -47.2 298.2
49.60 -57.18 1: 7:18. ! 57.9 136.3 -45.7 294.6
49.12 -60.25 1: 7:40. ! 56.8 131.5 -44.1 291.2
48.59 -63.30 1: 8: 2. ! 55.7 126.8 -42.5 287.8
48.02 -66.35 1: 8:24. ! 54.4 122.3 -40.7 284.7
47.40 -69.41 1: 8:47. ! 52.9 118.0 -38.9 281.6
46.73 -72.46 1: 9: 9. ! 51.4 113.9 -37.1 278.6
46.01 -75.52 1: 9:31. ! 49.8 110.0 -35.1 275.8
45.24 -78.60 1: 9:53. ! 48.1 106.3 -33.1 273.0
44.41 -81.71 1:10:15. ! 46.2 102.8 -31.0 270.3
43.52 -84.85 1:10:37. ! 44.2 99.3 -28.8 267.7
42.57 -88.04 1:10:59. ! 42.1 96.0 -26.5 265.2
41.54 -91.29 1:11:21. ! 39.8 92.9 -24.0 262.7
40.43 -94.63 1:11:43. ! 37.4 89.8 -21.4 260.3
39.23 -98.09 1:12: 5. ! 34.8 86.8 -18.7 257.8
37.91 -101.71 1:12:27. ! 31.9 83.9 -15.7 255.4
36.45 -105.55 1:12:50. ! 28.8 81.0 -12.4 253.0
34.80 -109.72 1:13:12. ! 25.2 78.1 -8.7 250.6
32.88 -114.41 1:13:34. ! 21.1 75.2 -4.5 247.9
-------------------------------------------------------------------------
Martin Federspiel ******** E-mail: martin@astro.unibas.ch
Astronomisches Institut ******** oder: federspi@astro.unibas.ch
der Universitaet Basel **** oder: federspielm@ubaclu.unibas.ch
Venusstr. 7 Telefon: (CH)-61/2055413
CH-4102 Binningen (Schweiz) Fax: (CH)-61/2055455
-------------------------------------------------------------------------
Jan Manek's update
IOTA/IOTA-ES occultation update for
(49) Pales / TYC 1880 01817 1 event on January 16/17, 2000
visible from Europe, Canada and USA
Summary
In the night January 16/17, 1999 a 9.6 mag star TYC 1880 01817 1 will be
occulted by a 154 km asteroid (49) Pales. This update is based on TMO and
USNO/Flagstaff astrometry for the asteroid and TRC1.0 star position.
The updated path shows small ~1 path width north shift with occultation time few seconds earlier compared to
Goffin's nominal prediction.
The path of this occultation runs over Romania ~00:58 UT, Hungary and
SW Slovakia at ~00:58.5 UT, NE Austria and SW Czech Repuplic at ~00:59 UT,
southern Germany ~00:59.5 UT, Belgium and N France ~01:00 UT, south England
at ~01:01 UT and S Ireland ~01:02 UT. After crossing Atlantic ocean path runs
over NW Newfoundland ~01:07 UT, very SE Quebec provincia with Quebec itself
also ~01:09 UT and runs to SW to USA. It runs oven Lake Huron, Michigan ~01:10.5 UT,
Lake Michigan, south Wisconsin and north Illinois at ~01:11 UT, SE Iowa ~01:11.5 UT,
NW tip of Missouri, SE tip of Nebraska and NW Kansas ~01:12 UT, SE Colorado
~01:12.5 UT, NW New Mexico ~01:13 UT and in twilight also middle Arizona.
I would count this as a favourable event, but as TYCHO gives for the star
'X' flag (=dubious astrometric reference star), the error of star position may
be larger than indicated (and therefore also the update accuracy).
The target star is the NE on in a small triangle of stars (11.0, 10.4 and 9.6 mags)
so these can be used as nice references. Good luck !
The event at one glimpse:
* date and approx. UT time of event: January 17, 2000 @ 00:59 UT (Euro)
01:11 UT (N.Am.)
* magnitude of target star: 9.6
* magnitude drop [mag]: 2.2
* estimated maximum duration [s]: 16.0
* path description: given above
* Goffin's original chart reference: A00_0110.PS.GZ
The occultation path:
* approximate ground width [km]: 180
* uncertainty [path widths]: 0.9
* uncertainty in time [s]: 15
* map: below
* remarks: Path uncertainities are given according to nominal star
position errors and expected asteroid positional accuracy.
!!!!!!!
Circles along the path are OCCULT exactly calculated centerline points.
!!!!!!!
Data for the target star:
* name: TYC 1880 01817 1
* constellation: Gemini
* J2000 position [h,m,s; o,',"]: 06h 35m 54.054s; +23o 18' 35.08"
* position source: TRC1.0
* estimated accuracy ["]: 0.05" (0.04", 0.03")
* V mag [mag]: 9.60
* B-V [mag]: +0.23
* remarks: TYCHO gives quality flag 4(=high) with '(unresolved) duplicity'
flag and also 'dubious astrometric reference star' flag. Although the
star position accuracy seems to be good, true position error may be
larger than indicated. Star is not in ACT.
Target star is in middle Gemini, approximately midway between 3.0 mag
star epsilon Geminorum and 2.9 mag variable mui Geminorum. Target star
is 17' NW of 7.0 mag star SAO 78545. Target star is the NE star and
also the brightest one in a small triangle.
Close finding chart:
* occulted star is in center - labeled with cross
* field is 1.4x1.4 degrees
* limiting magnitude is 12.5
* labeled stars have indicated SAO numbers
Data for the minor planet:
* general information:
number, name: (49) Pales
approx. diameter [km]: 154
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 52 USNO, 27 TMO
number of rejected observations: 4 USNO, 1 TMO
time covered by the observations: 1998 06 26 - 1999 12 31
rms residuals ["] (RA,DE): 0.07", 0.07"
estimated positional accuracy at epoch of event ["]: 0.07"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 01:04:38 UT
* approx. V mag of minor planet at event [mag]: 11.6
* geocentric parallax of minor planet ["]: 5.095
* magnitude drop [mag]: 2.2
* estimated maximum duration [s]: 16.0
* apparent motion of minor planet ["/h]: 27.68
* angular distance to moon, phase of moon [deg,%]: 40, 76%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
........ shortened ..........................
+ 35 00 00 + 43 15 59 0 57 00 33 -45
+ 33 00 00 + 43 51 30 0 57 11 34 -46
+ 31 00 00 + 44 25 44 0 57 23 36 -48
+ 29 00 00 + 44 58 43 0 57 34 37 -49
+ 27 00 00 + 45 30 25 0 57 46 38 -50
+ 25 00 00 + 46 00 50 0 57 58 40 -51
+ 23 00 00 + 46 30 00 0 58 10 41 -52
+ 21 00 00 + 46 57 53 0 58 23 42 -53
+ 19 00 00 + 47 24 30 0 58 35 43 -53
+ 17 00 00 + 47 49 52 0 58 48 45 -54
+ 15 00 00 + 48 13 59 0 59 01 46 -55
+ 13 00 00 + 48 36 51 0 59 14 47 -56
+ 11 00 00 + 48 58 29 0 59 27 48 -56
+ 9 00 00 + 49 18 54 0 59 40 49 -57
+ 7 00 00 + 49 38 05 0 59 53 50 -57
+ 5 00 00 + 49 56 04 1 00 06 51 -58
+ 3 00 00 + 50 12 52 1 00 19 52 -58
+ 1 00 00 + 50 28 28 1 00 32 53 -59
- 1 00 00 + 50 42 54 1 00 46 54 -59
- 3 00 00 + 50 56 09 1 00 59 54 -59
- 5 00 00 + 51 08 15 1 01 12 55 -59
- 7 00 00 + 51 19 12 1 01 26 56 -59
- 9 00 00 + 51 29 00 1 01 39 57 -59
- 11 00 00 + 51 37 40 1 01 53 57 -59
- 13 00 00 + 51 45 13 1 02 06 58 -59
........ shortened ..........................
- 47 00 00 + 51 03 17 1 06 01 60 -50
- 49 00 00 + 50 50 43 1 06 15 60 -49
- 51 00 00 + 50 37 00 1 06 30 59 -49
- 53 00 00 + 50 22 07 1 06 44 59 -48
- 55 00 00 + 50 06 04 1 06 58 58 -47
- 57 00 00 + 49 48 49 1 07 13 58 -46
- 59 00 00 + 49 30 24 1 07 27 57 -45
- 61 00 00 + 49 10 46 1 07 41 56 -44
- 63 00 00 + 48 49 56 1 07 56 56 -43
- 65 00 00 + 48 27 52 1 08 10 55 -41
- 67 00 00 + 48 04 36 1 08 25 54 -40
- 69 00 00 + 47 40 05 1 08 39 53 -39
- 71 00 00 + 47 14 20 1 08 54 52 -38
- 73 00 00 + 46 47 20 1 09 08 51 -37
- 75 00 00 + 46 19 06 1 09 23 50 -35
- 77 00 00 + 45 49 36 1 09 37 49 -34
- 79 00 00 + 45 18 51 1 09 51 48 -33
- 81 00 00 + 44 46 51 1 10 05 47 -31
- 83 00 00 + 44 13 36 1 10 20 45 -30
- 85 00 00 + 43 39 06 1 10 34 44 -29
- 87 00 00 + 43 03 22 1 10 48 43 -27
- 89 00 00 + 42 26 25 1 11 01 41 -26
- 91 00 00 + 41 48 15 1 11 15 40 -24
- 93 00 00 + 41 08 53 1 11 28 39 -23
- 95 00 00 + 40 28 20 1 11 41 37 -21
- 97 00 00 + 39 46 39 1 11 54 36 -20
- 99 00 00 + 39 03 50 1 12 07 34 -18
-101 00 00 + 38 19 56 1 12 19 32 -16
-103 00 00 + 37 34 59 1 12 31 31 -15
-105 00 00 + 36 49 01 1 12 42 29 -13
-107 00 00 + 36 02 05 1 12 53 27 -11
-109 00 00 + 35 14 14 1 13 04 26 -9
-111 00 00 + 34 25 32 1 13 14 24 -8
........ shortened ..........................
----------------------------------------------------------------------------
Jan Manek
Stefanik Observatory Private :
Petrin 205 Werichova 950
118 46 Praha 1 152 00 Praha 5 - Barrandov |_|_|
Czech Republic Czech Republic / \
Internet : jmanek@mbox.vol.cz |-O-O-|
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