MPEC 2018-E17 : A/2017 U7
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M.P.E.C. 2018-E17 Issued 2018 Mar. 4, 22:15 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Division F of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
A/2017 U7
Observations:
AK17U070 C2017 08 18.53258 01 51 30.893-32 48 26.90 23.1 wLEE017F51
AK17U070 C2017 08 18.53969 01 51 30.686-32 48 30.15 23.0 wLEE017F51
AK17U070 C2017 08 18.55397 01 51 30.248-32 48 36.25 LEE017F51
AK17U070 C2017 09 13.47314 01 35 22.184-35 57 56.51 22.4 iLEE017F51
AK17U070 C2017 09 13.48241 01 35 21.784-35 58 00.16 21.9 iLEE017F51
AK17U070 C2017 09 13.49166 01 35 21.359-35 58 04.06 22.5 iLEE017F51
AK17U070 C2017 09 13.50093 01 35 20.903-35 58 08.01 22.8 iLEE017F51
AK17U070 C2017 10 07.39378 01 14 51.282-38 15 13.58 20.9 iLEE017F51
AK17U070 C2017 10 07.40278 01 14 50.783-38 15 15.88 21.0 iLEE017F51
AK17U070 C2017 10 07.41178 01 14 50.279-38 15 18.41 20.8 iLEE017F51
AK17U070 C2017 10 07.42079 01 14 49.770-38 15 20.73 20.8 iLEE017F51
AK17U070* C2017 10 29.32588 00 54 27.777-39 20 56.27 20.1 iLEE017F51
AK17U070 C2017 10 29.32588 00 54 27.777-39 20 56.27 20.1 iLEE017F51
AK17U070 C2017 10 29.33443 00 54 27.308-39 20 56.82 20.1 iLEE017F51
AK17U070 C2017 10 29.33443 00 54 27.308-39 20 56.82 20.1 iLEE017F51
AK17U070 C2017 10 29.34296 00 54 26.848-39 20 57.72 20.1 iLEE017F51
AK17U070 C2017 10 29.34296 00 54 26.848-39 20 57.72 20.1 iLEE017F51
AK17U070 |C2017 10 30.19858 00 53 40.47 -39 22 10.9 20.3 VuEE017807
AK17U070 |C2017 10 30.20160 00 53 40.29 -39 22 11.1 20.3 VuEE017807
AK17U070 |C2017 10 30.20461 00 53 40.14 -39 22 11.4 20.3 VuEE017807
AK17U070 |C2017 10 31.06191 00 52 54.02 -39 23 19.3 19.9 VuEE017807
AK17U070 |C2017 10 31.06392 00 52 53.90 -39 23 19.4 20.1 VuEE017807
AK17U070 |C2017 10 31.06596 00 52 53.79 -39 23 19.6 20.1 VuEE017807
AK17U070 |C2017 10 31.06798 00 52 53.67 -39 23 19.8 20.1 VuEE017807
AK17U070 |C2017 11 01.11730 00 51 57.42 -39 24 35.0 20.2 GUEE017807
AK17U070 |C2017 11 01.11933 00 51 57.32 -39 24 35.1 20.1 GUEE017807
AK17U070 |C2017 11 01.12135 00 51 57.20 -39 24 35.2 20.0 GUEE017807
AK17U070 |C2017 11 06.19763 00 47 31.00 -39 28 33.9 20.1 GUEE017807
AK17U070 |C2017 11 06.20227 00 47 30.76 -39 28 34.1 20.1 GUEE017807
AK17U070 |C2017 11 06.20672 00 47 30.53 -39 28 34.2 20.1 GUEE017807
AK17U070 C2017 11 06.28926 00 47 26.350-39 28 37.14 20.0 iLEE017F51
AK17U070 C2017 11 06.29896 00 47 25.845-39 28 37.55 20.3 iLEE017F51
AK17U070 C2017 11 06.30865 00 47 25.331-39 28 37.69 20.5 iLEE017F51
AK17U070 C2017 11 06.31835 00 47 24.826-39 28 37.87 20.3 iLEE017F51
AK17U070 1C2017 11 07.43401 00 46 27.86 -39 29 01.7 vEE017Q62
AK17U070 1C2017 11 07.43652 00 46 27.76 -39 29 01.6 vEE017Q62
AK17U070 1C2017 11 07.43903 00 46 27.64 -39 29 01.5 19.2 wvEE017Q62
AK17U070 C2017 11 22.25466 00 34 52.856-39 20 04.39 20.2 wLEE017F51
AK17U070 C2017 11 22.26450 00 34 52.434-39 20 03.59 20.2 wLEE017F51
AK17U070 C2017 11 22.27434 00 34 52.022-39 20 02.78 20.2 wLEE017F51
AK17U070 C2017 11 22.28417 00 34 51.598-39 20 01.84 20.3 wLEE017F51
AK17U070 4C2017 11 22.47907 00 34 43.31 -39 19 43.8 19.8 RvEE017E10
AK17U070 4C2017 11 22.48125 00 34 43.22 -39 19 43.6 19.8 RvEE017E10
AK17U070 4C2017 11 22.48343 00 34 43.13 -39 19 43.5 19.7 RvEE017E10
AK17U070 _C2017 11 24.28167200 33 28.218-39 16 56.59 20.3 GUEE017568
AK17U070 _C2017 11 24.28303400 33 28.164-39 16 56.47 20.2 GUEE017568
AK17U070 _C2017 11 24.28421400 33 28.109-39 16 56.39 20.3 GUEE017568
AK17U070 C2017 12 01.04379200 29 06.15 -39 03 36.3 19.1 RtEE017W85
AK17U070 C2017 12 01.04637100 29 06.08 -39 03 35.6 19.0 RtEE017W85
AK17U070 C2017 12 01.04895100 29 05.96 -39 03 35.7 18.9 RtEE017W85
AK17U070 C2017 12 01.05153100 29 05.86 -39 03 35.1 18.9 RtEE017W85
AK17U070 C2017 12 08.17669200 25 05.06 -38 45 19.9 19.3 RtEE017W87
AK17U070 C2017 12 08.17997000 25 04.97 -38 45 19.5 18.8 RtEE017W87
AK17U070 C2017 12 08.18325200 25 04.86 -38 45 18.9 18.7 RtEE017W87
AK17U070 C2017 12 08.18653400 25 04.76 -38 45 18.1 19.3 RtEE017W87
AK17U070 KC2017 12 18.82050800 20 14.927-38 11 39.16 19.2 GUEE017J04
AK17U070 KC2017 12 18.82491400 20 14.832-38 11 38.13 19.1 GUEE017J04
AK17U070 KC2017 12 18.82931700 20 14.717-38 11 37.20 19.3 GUEE017J04
AK17U070 |C2017 12 22.09066 00 19 02.42 -38 00 03.6 19.8 VuEE017807
AK17U070 |C2017 12 22.09532 00 19 02.32 -38 00 02.8 19.9 VuEE017807
AK17U070 |C2017 12 22.09997 00 19 02.22 -38 00 01.6 19.9 VuEE017807
AK17U070 |C2017 12 25.04511 00 18 03.63 -37 49 12.9 19.6 VuEE017807
AK17U070 |C2017 12 25.04975 00 18 03.53 -37 49 12.1 19.7 VuEE017807
AK17U070 |C2017 12 25.05440 00 18 03.46 -37 49 11.0 19.6 VuEE017807
AK17U070 KC2017 12 30.07204 00 16 37.79 -37 30 05.2 19.1 RoEE017291
AK17U070 KC2017 12 30.08498 00 16 37.58 -37 30 02.2 19.7 RoEE017291
AK17U070 KC2017 12 30.09792 00 16 37.33 -37 29 59.6 19.8 RoEE017291
AK17U070 |C2018 01 03.06884 00 15 41.76 -37 14 22.4 19.4 GUEE017807
AK17U070 |C2018 01 03.07357 00 15 41.70 -37 14 21.2 19.5 GUEE017807
AK17U070 |C2018 01 03.07851 00 15 41.64 -37 14 20.0 19.5 GUEE017807
AK17U070 1C2018 01 06.43679 00 15 02.77 -37 00 52.8 vEE017Q62
AK17U070 1C2018 01 06.43928 00 15 02.72 -37 00 52.4 vEE017Q62
AK17U070 1C2018 01 06.44176 00 15 02.67 -37 00 52.1 19.3 wvEE017Q62
AK17U070 |C2018 01 09.05225 00 14 37.43 -36 50 17.9 19.6 VuEE017807
AK17U070 |C2018 01 09.05685 00 14 37.39 -36 50 16.8 19.6 VuEE017807
AK17U070 |C2018 01 11.05359 00 14 20.98 -36 42 08.9 19.7 VuEE017807
AK17U070 |C2018 01 11.05822 00 14 20.94 -36 42 07.7 19.5 VuEE017807
AK17U070 |C2018 01 11.06288 00 14 20.90 -36 42 06.5 19.4 VuEE017807
AK17U070 |C2018 01 20.05253 00 13 36.25 -36 05 18.7 19.5 GUEE017807
AK17U070 |C2018 01 20.05556 00 13 36.24 -36 05 18.0 19.6 GUEE017807
AK17U070 |C2018 01 20.05892 00 13 36.24 -36 05 17.2 19.5 GUEE017807
AK17U070 |C2018 01 26.04131 00 13 31.07 -35 41 00.7 18.9 GUEE017807
AK17U070 |C2018 01 26.04472 00 13 31.07 -35 41 00.0 19.3 GUEE017807
AK17U070 |C2018 01 26.04814 00 13 31.07 -35 40 59.1 19.3 GUEE017807
AK17U070 |C2018 01 28.04406 00 13 33.36 -35 32 59.5 19.0 GUEE017807
AK17U070 |C2018 01 28.04783 00 13 33.36 -35 32 58.8 19.1 GUEE017807
AK17U070 |C2018 01 28.05163 00 13 33.35 -35 32 57.5 19.0 GUEE017807
AK17U070 |C2018 02 10.04925 00 14 31.39 -34 42 50.1 19.1 GUEE017807
AK17U070 |C2018 02 10.05179 00 14 31.40 -34 42 49.5 19.2 GUEE017807
AK17U070 |C2018 02 10.05468 00 14 31.42 -34 42 48.8 19.3 GUEE017807
Observer details:
291 LPL/Spacewatch II. Observer T. H. Bressi. 1.8-m f/2.7 reflector + CCD.
568 Mauna Kea. Observers K. J. Meech, J. Kleyna, C. Wipper. Measurers
M. Micheli, J. Kleyna. 3.6-m Canada-France-Hawaii Telescope + CCD.
807 Cerro Tololo. Observers T. Linder, R. Holmes. 0.61-m f/6.5 astrograph
+ CCD, 1.00-m f/10.0 astrograph + CCD.
E10 Siding Spring-Faulkes Telescope South. Observers P. Miller, E. Gomez,
R. Holmes, R. Miles, T. Linder, L. Buzzi, S. Foglia. Measurers S. Foglia,
L. Buzzi. 2.0-m f/10.0 Ritchey-Chretien + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz,
M. Willman. Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
M. Huber, , E. Lilly, E. Magnier, R. Wainscoat, C. Waters, R. Weryk.
1.8-m Ritchey-Chretien + CCD.
J04 ESA Optical Ground Station, Tenerife. Observer D. Abreu. Measurers
M. Micheli, D. Koschny, A. Knoefel, M. Busch, E. Schwab. 1.0-m f/4.4
reflector + CCD.
Q62 iTelescope Observatory, Siding Spring. Observer H. Sato. 0.51-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
W85 Cerro Tololo-LCO A. Observers J. D. Armstrong, Z. N. Teagarden,
S. W. Ryden. 1.0-m f/8 Ritchey-Chretien + CCD.
W87 Cerro Tololo-LCO C. Observers J. D. Armstrong, S. R. Moss. 1.0-m f/8
Ritchey-Chretien + CCD.
Orbital elements:
A/2017 U7
Epoch 2019 Aug. 25.0 TT = JDT 2458720.5
T 2019 Sept. 11.21093 TT MPCW
q 6.4178352 (2000.0) P Q
z -0.0001150 Peri. 326.02357 +0.53158001 -0.59451857
+/-0.0000023 Node 276.23314 -0.57718434 -0.77555085
e 1.0007381 Incl. 142.63523 -0.61990397 +0.21229355
From 87 observations 2017 Aug. 18-2018 Feb. 10, mean residual 0".2.
A/2017 U7
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2019 Sept. 10.52791 TT MPCW
q 6.4186788 (2000.0) P Q
z -0.0002310 Peri. 325.96205 +0.53209421 -0.59409020
+/-0.0000023 Node 276.22261 -0.57644877 -0.77605843
e 1.0014825 Incl. 142.63838 -0.62014722 +0.21163680
From 87 observations 2017 Aug. 18-2018 Feb. 10, mean residual 0".2.
The original barycentric 1/a value is +0.00011957 au^-1 and the future
barycentric 1/a value is -0.00000374 au^-1.
Ephemeris:
A/2017 U7
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2018 02 02 00 13 47.0 -35 13 26 8.1675 7.5219 46.4 5.4 20.7
...
2018 02 17 00 15 29.3 -34 17 59 8.2282 7.4714 37.7 4.6 20.6
...
2018 02 25 00 16 54.5 -33 51 37 8.2393 7.4447 34.5 4.3 20.6
...
2018 03 03 00 18 09.0 -33 33 42 8.2375 7.4249 32.9 4.2 20.6
2018 03 04 00 18 22.2 -33 30 53 8.2363 7.4216 32.7 4.1 20.6
2018 03 05 00 18 35.6 -33 28 06 8.2349 7.4184 32.6 4.1 20.6
...
2018 03 11 00 19 59.5 -33 12 34 8.2212 7.3987 32.1 4.1 20.6
...
2018 03 19 00 21 59.2 -32 54 59 8.1891 7.3728 32.9 4.2 20.6
...
2018 04 03 00 25 54.8 -32 32 59 8.0866 7.3249 38.0 4.8 20.6
Gareth V. Williams (C) Copyright 2018 MPC M.P.E.C. 2018-E17
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