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    • MPEC 2017-J21 : 2017 HO49

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    M.P.E.C. 2017-J21                                Issued 2017 May 2, 04:10 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

                                   2017 HO49

Observations:
     K17H49O* C2017 04 27.48349 15 14 40.954-08 18 53.16         22.0 wLEJ021F51
     K17H49O  C2017 04 27.49803 15 14 43.180-08 19 22.02         21.7 wLEJ021F51
     K17H49O  C2017 04 27.51253 15 14 45.384-08 19 50.39         21.6 wLEJ021F51
     K17H49O |C2017 04 28.34203 15 17 10.74 -08 47 38.0          21.8 VuEJ021807
     K17H49O |C2017 04 28.34766 15 17 11.70 -08 47 49.8          22.1 VuEJ021807
     K17H49O |C2017 04 28.35344 15 17 12.68 -08 48 02.3          21.8 VuEJ021807
     K17H49O _C2017 04 28.40364615 17 24.959-08 50 31.64         21.2 GUEJ021568
     K17H49O _C2017 04 28.40463415 17 25.122-08 50 33.79         21.3 GUEJ021568
     K17H49O _C2017 04 28.40562315 17 25.290-08 50 35.98         21.3 GUEJ021568
     K17H49O  C2017 04 30.27076 15 23 25.82 -10 01 56.6          21.3 RoEJ021926
     K17H49O  C2017 04 30.27619 15 23 26.83 -10 02 10.1          21.6 RoEJ021926
     K17H49O  C2017 04 30.28292 15 23 28.10 -10 02 27.1          21.5 RoEJ021926
     K17H49O  C2017 05 01.29680 15 27 03.63 -10 45 32.3          22.1 VqEJ021I52
     K17H49O  C2017 05 01.29884 15 27 04.09 -10 45 38.2                qEJ021I52
     K17H49O  C2017 05 01.30064 15 27 04.41 -10 45 42.3                qEJ021I52
     K17H49O  C2017 05 01.30244 15 27 04.75 -10 45 48.1                qEJ021I52
     K17H49O  C2017 05 01.38465 15 27 21.39 -10 49 24.7          20.8 RoEJ021926
     K17H49O  C2017 05 01.39007 15 27 22.44 -10 49 40.1          21.7 RoEJ021926
     K17H49O  C2017 05 01.39681 15 27 23.82 -10 49 57.2          21.1 RoEJ021926
     K17H49O KC2017 05 01.59994715 28 09.62 -10 57 57.3          20.9 RcEJ021474
     K17H49O KC2017 05 01.60582415 28 10.89 -10 58 12.4          21.1 RcEJ021474
     K17H49O KC2017 05 01.61111415 28 12.03 -10 58 26.3          21.5 RcEJ021474

Observer details:
474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore,
    P. M. Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
568 Mauna Kea.  Observers R. J. Wainscoat, C. Wipper.  Measurers M. Micheli,
    R. J. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  0.61-m f/6.5 astrograph
    + CCD.
926 Tenagra II Observatory.  Observers M. Schwartz, P. R. Holvorcem.  Measurer
    M. Schwartz.  0.41-m f/3.75 astrograph + CCD, 0.81-m f/7 Ritchey-Chretien
    + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers B. Gibson, T. Goggia, S. Kahale,
    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.
I52 Steward Observatory, Mt. Lemmon Station.  Observer R. A. Kowalski.
    Measurers E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
    J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. G. Matheny,
    R. L. Seaman, F. C. Shelly.  1.0-m reflector + CCD.

Orbital elements:
2017 HO49                                                Earth MOID = 0.0587 AU
Epoch 2017 Feb. 16.0 TT = JDT 2457800.5                 MPC
M 333.92756              (2000.0)            P               Q
n   0.22888796     Peri.  212.95807     -0.08586651     +0.99253755
a   2.6467977      Node    52.26478     -0.88876761     -0.03703671
e   0.6040996      Incl.    6.28522     -0.45024336     -0.11617873
P   4.31           H   24.3           G   0.15           U   7
Residuals in seconds of arc
170427 F51  0.1+  0.2-    170428 568  0.1-  0.1-    170501 926  0.4+  0.5+
170427 F51  0.1+  0.1-    170430 926  0.2+  0.0     170501 926  0.3-  0.5-
170427 F51  0.2-  0.3+    170430 926  0.1+  0.1-    170501 926  0.1-  0.2+
170428 807  0.2-  0.3+    170430 926  0.1+  0.4-    170501 474  0.4-  0.7-
170428 807  0.0   0.3+    170501 I52  0.3-  0.3+    170501 474  0.2+  0.0
170428 807  0.2+  0.1-    170501 I52  0.4+  0.1-    170501 474  0.7+  0.4+
170428 568  0.2-  0.0     170501 I52  0.2-  0.6+
170428 568  0.1-  0.0     170501 I52  0.6-  0.5-

Ephemeris:
2017 HO49                a,e,i = 2.65, 0.60, 6                   q = 1.0479
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2017 04 02    14 30 35.5 -01 50 58   0.3872  1.3570   153.5    19.2    23.9
...
2017 04 17    14 51 39.4 -04 15 00   0.2591  1.2518   161.2    15.0    22.7
...
2017 04 25    15 08 04.3 -07 03 03   0.2014  1.2012   164.5    13.0    22.0
...
2017 05 01    15 25 57.9 -10 31 57   0.1632  1.1667   166.3    11.8    21.4
2017 05 02    15 29 41.5 -11 16 43   0.1573  1.1613   166.4    11.7    21.3
2017 05 03    15 33 41.7 -12 04 54   0.1515  1.1559   166.6    11.7    21.2
...
2017 05 09    16 05 30.8 -18 20 23   0.1202  1.1261   165.2    13.2    20.7
...
2017 05 17    17 24 11.0 -31 00 40   0.09094 1.0929   152.7    25.1    20.4
...
2017 06 01    21 54 34.4 -41 38 52   0.09770 1.0543   111.8    63.2    21.6

A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-J21

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