Cora»OccDetail

Stellar Occultation by (87) Sylvia on 2026-01-23 (22:42:03 UT)

Event Details
Occultation UUID [and db] : 68d127d0-de6b-11f0-4858-db6fafbfd3bc [asteroids] Occultation Date + Time : 2026-01-23 at 22:42:03 UT +/- 0.02 min [1] Object Designation : (87) Sylvia Star Designation : GDR3 3445318517405639680 Star Coordinates (ICRF) : RA = 05 28 09.5363, DE = +28 08 27.672 [2] Star Magnitudes : G = 13.15 mag, RP = 12.19 mag, BP = 14.1 mag Object Magnitude : V = 12.59 mag Estimated Magnitude Drop : 0.5 mag Estimated Max. Duration : 32.4 sec Speed of the shadow : 8.0 km/s Object Mean Diameter : 260.9 km (src: astorb) => apparent = 129 mas Apparent Motion : 0.2383 arcs/min @ PA = 276 deg Horizontal Parallax : 3.1490 arcs Dynamical Class : MBA Elongation to Moon & Sun : 78° (sunlit = 26%), Sun = 139° Cross-track uncertainty : 1.4 mas = 2 km = 0.01 path-width (1-sig) RUWE and duplicate source : 4.45 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#128 Note : FP:true Object is a <Gaia mass determination> target ! [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and db] : 68d127d0-de6b-11f0-4858-db6fafbfd3bc [asteroids]

 Occultation Date + Time   : 2026-01-23 at 22:42:03 UT +/- 0.02 min  [1]
 Object Designation        : (87) Sylvia
 Star Designation          : GDR3 3445318517405639680
 Star Coordinates (ICRF)   : RA = 05 28 09.5363, DE = +28 08 27.672  [2]
 Star Magnitudes           : G = 13.15 mag, RP = 12.19 mag, BP = 14.1 mag
 Object Magnitude          : V = 12.59 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 32.4 sec
 Speed of the shadow       : 8.0 km/s
 Object Mean Diameter      : 260.9 km  (src: astorb) => apparent = 129 mas
 Apparent Motion           : 0.2383 arcs/min @ PA = 276 deg
 Horizontal Parallax       : 3.1490 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 78° (sunlit = 26%), Sun = 139°
 Cross-track uncertainty   : 1.4 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 4.45 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#128
 Note                      : FP:true

 Object is a <Gaia mass determination> target !

 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations

SiMDA \| 3D Asteroid Catalogue \| Johnston Archive \| Star at CDS (Vizier) \| JPL Small-Body Node \| Minor Planet Center \| Wikipedia

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Occultation Ground Track
Time[UT] \| Lat----CENTR----Lon \| Alt hh:mm:ss \| +DD.dddd +DDD.dddd \| deg ---------------------------------------------- 22:31:22 +29.2941 +080.8289 +06 299 -39 22:31:58 +35.5334 +069.9424 +17 293 -47 22:32:34 +39.2221 +063.3755 +23 289 -51 22:33:10 +42.1716 +057.9203 +27 284 -54 22:33:46 +44.7119 +052.9930 +31 280 -55 22:34:21 +46.9765 +048.3521 +35 276 -56 22:34:57 +49.0341 +043.8662 +38 271 -56 22:35:33 +50.9248 +039.4518 +40 266 -56 22:36:09 +52.6730 +035.0498 +43 261 -55 22:36:45 +54.2945 +030.6146 +45 256 -55 22:37:21 +55.7987 +026.1095 +47 250 -53 22:37:57 +57.1910 +021.5037 +49 244 -52 22:38:33 +58.4735 +016.7710 +50 237 -50 22:39:08 +59.6458 +011.8892 +51 230 -49 22:39:44 +60.7055 +006.8409 +52 223 -47 22:40:20 +61.6483 +001.6132 +53 215 -45 22:40:56 +62.4687 -003.8004 +54 207 -43 22:41:32 +63.1601 -009.3999 +54 199 -41 22:42:08 +63.7152 -015.1772 +54 190 -39 22:42:44 +64.1267 -021.1163 +54 181 -37 22:43:20 +64.3871 -027.1924 +54 172 -34 22:43:55 +64.4898 -033.3742 +53 164 -32 22:44:31 +64.4290 -039.6249 +52 155 -29 22:45:07 +64.1997 -045.9055 +51 146 -27 22:45:43 +63.7983 -052.1785 +50 138 -24 22:46:19 +63.2216 -058.4109 +48 130 -22 22:46:55 +62.4666 -064.5776 +46 122 -19 22:47:31 +61.5295 -070.6643 +44 115 -16 22:48:07 +60.4044 -076.6692 +42 108 -13 22:48:42 +59.0816 -082.6055 +40 101 -10 22:49:18 +57.5448 -088.5043 +37 094 -06 22:49:54 +55.7666 -094.4200 +34 088 -03 22:50:30 +53.6997 -100.4434 +30 082 +01 22:51:06 +51.2569 -106.7325 +26 077 +06 22:51:42 +48.2551 -113.6044 +21 071 +11 22:52:18 +44.1718 -121.9423 +14 064 +18 Longitude measured positiv to the East.

Occultation Ground Track

 Time[UT] | Lat----CENTR----Lon | Alt hh:mm:ss | +DD.dddd  +DDD.dddd | deg ---------------------------------------------- 22:31:22   +29.2941  +080.8289   +06  299  -39 22:31:58   +35.5334  +069.9424   +17  293  -47 22:32:34   +39.2221  +063.3755   +23  289  -51 22:33:10   +42.1716  +057.9203   +27  284  -54 22:33:46   +44.7119  +052.9930   +31  280  -55 22:34:21   +46.9765  +048.3521   +35  276  -56 22:34:57   +49.0341  +043.8662   +38  271  -56 22:35:33   +50.9248  +039.4518   +40  266  -56 22:36:09   +52.6730  +035.0498   +43  261  -55 22:36:45   +54.2945  +030.6146   +45  256  -55 22:37:21   +55.7987  +026.1095   +47  250  -53 22:37:57   +57.1910  +021.5037   +49  244  -52 22:38:33   +58.4735  +016.7710   +50  237  -50 22:39:08   +59.6458  +011.8892   +51  230  -49 22:39:44   +60.7055  +006.8409   +52  223  -47 22:40:20   +61.6483  +001.6132   +53  215  -45 22:40:56   +62.4687  -003.8004   +54  207  -43 22:41:32   +63.1601  -009.3999   +54  199  -41 22:42:08   +63.7152  -015.1772   +54  190  -39 22:42:44   +64.1267  -021.1163   +54  181  -37 22:43:20   +64.3871  -027.1924   +54  172  -34 22:43:55   +64.4898  -033.3742   +53  164  -32 22:44:31   +64.4290  -039.6249   +52  155  -29 22:45:07   +64.1997  -045.9055   +51  146  -27 22:45:43   +63.7983  -052.1785   +50  138  -24 22:46:19   +63.2216  -058.4109   +48  130  -22 22:46:55   +62.4666  -064.5776   +46  122  -19 22:47:31   +61.5295  -070.6643   +44  115  -16 22:48:07   +60.4044  -076.6692   +42  108  -13 22:48:42   +59.0816  -082.6055   +40  101  -10 22:49:18   +57.5448  -088.5043   +37  094  -06 22:49:54   +55.7666  -094.4200   +34  088  -03 22:50:30   +53.6997  -100.4434   +30  082  +01 22:51:06   +51.2569  -106.7325   +26  077  +06 22:51:42   +48.2551  -113.6044   +21  071  +11 22:52:18   +44.1718  -121.9423   +14  064  +18

Longitude measured positiv to the East.

------------------------------------------------------------------------------------------- Azm Sun | Lat----EDGE1----Lon | Lat----EDGE2----Lon deg deg | +DD.dddd +DDD.dddd | +DD.dddd +DDD.dddd --------------------------------------------- +30.7366 +075.3485 +27.4762 +086.8105 +35.5555 +066.8659 +35.2472 +073.4998 +38.9225 +060.7654 +39.3955 +066.2391 +41.6954 +055.5286 +42.5632 +060.5054 +44.1123 +050.7324 +45.2474 +055.4236 +46.2793 +046.1828 +47.6222 +050.6814 +48.2541 +041.7686 +49.7718 +046.1201 +50.0709 +037.4174 +51.7435 +041.6424 +51.7514 +033.0770 +53.5658 +037.1804 +53.3093 +028.7071 +55.2565 +032.6824 +54.7533 +024.2752 +56.8265 +028.1065 +56.0882 +019.7546 +58.2818 +023.4170 +57.3159 +015.1225 +59.6245 +018.5832 +58.4364 +010.3605 +60.8542 +013.5786 +59.4476 +005.4540 +61.9678 +008.3813 +60.3459 +000.3931 +62.9604 +002.9752 +61.1269 -004.8274 +63.8252 -002.6492 +61.7849 -010.2067 +64.5545 -008.4929 +62.3139 -015.7379 +65.1394 -014.5470 +62.7076 -021.4079 +65.5710 -020.7917 +62.9597 -027.1969 +65.8406 -027.1962 +63.0644 -033.0801 +65.9405 -033.7200 +63.0165 -039.0287 +65.8641 -040.3161 +62.8114 -045.0121 +65.6063 -046.9343 +62.4452 -051.0007 +65.1637 -053.5266 +61.9144 -056.9679 +64.5337 -060.0521 +61.2156 -062.8933 +63.7141 -066.4804 +60.3445 -068.7647 +62.7017 -072.7953 +59.2950 -074.5798 +61.4909 -078.9968 +58.0577 -080.3488 +60.0717 -085.1028 +56.6177 -086.0969 +58.4260 -091.1524 +54.9508 -091.8694 +56.5220 -097.2125 +53.0166 -097.7417 +54.3030 -103.3942 +50.7435 -103.8429 +51.6600 -109.8953 +47.9897 -110.4194 +48.3450 -117.1421 +44.4013 -118.0733 +43.4862 -126.5983 Azimuth (Azm) measured from North to East.

Apply ephem. offset (O-C) in RA & DE and CTU:
CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.