[Iaude] MPEC J16: 2021 HC3 [a=1.12,e=0.67,i=28.3,H=21.4,PHA]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sun May 2 09:46:43 EDT 2021


M.P.E.C. 2021-J16                                   Issued 2021 May 2, 13:45 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 at CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                                    2021 HC3                                    


Observations:
     K21H03C* C2021 04 30.48881115 50 51.96 -07 08 31.5          17.05oVEJ016T05
     K21H03C  C2021 04 30.51958715 50 46.88 -06 56 31.5          16.64oVEJ016T05
     K21H03C  C2021 04 30.52738515 50 45.59 -06 53 27.9          16.82oVEJ016T05
     K21H03C  C2021 05 01.21630115 49 19.41 -01 53 09.0          16.57GVEJ016I52
     K21H03C  C2021 05 01.21655215 49 19.35 -01 53 01.4          16.37GVEJ016I52
     K21H03C  C2021 05 01.21680415 49 19.31 -01 52 54.2          16.15GVEJ016I52
     K21H03C  C2021 05 01.21705515 49 19.26 -01 52 47.2          16.49GVEJ016I52
     K21H03C  C2021 05 01.30873 15 49 00.04 -01 07 59.5          16.2 RqEJ016H36
     K21H03C  C2021 05 01.30990 15 48 59.81 -01 07 24.7          16.4 RqEJ016H36
     K21H03C  C2021 05 01.31137 15 48 59.52 -01 06 40.5          16.1 RqEJ016H36
     K21H03C  C2021 05 01.31225 15 48 59.35 -01 06 14.2          16.3 RqEJ016H36
     K21H03C  C2021 05 01.31284 15 48 59.24 -01 05 56.6          16.2 RqEJ016H36
     K21H03C  C2021 05 01.38639415 48 46.23 -00 28 41.3          16.81GVEJ016703
     K21H03C  C2021 05 01.39165915 48 45.13 -00 26 01.4          16.57GVEJ016703
     K21H03C  C2021 05 01.39692915 48 44.04 -00 23 18.7          16.57GVEJ016703
     K21H03C  C2021 05 01.40219515 48 43.05 -00 20 38.8          16.74GVEJ016703
     K21H03C KC2021 05 01.62772 15 48 07.63 +01 41 24.7          16.7 VqEJ016E23
     K21H03C KC2021 05 01.63466 15 48 06.12 +01 45 13.4          16.7 VqEJ016E23
     K21H03C KC2021 05 01.64161 15 48 04.59 +01 49 03.5          16.9 VqEJ016E23
     K21H03C KC2021 05 01.88219 15 47 27.54 +04 03 51.1          16.3 GVEJ016958
     K21H03C KC2021 05 01.88368 15 47 27.22 +04 04 44.6          16.3 GVEJ016958
     K21H03C KC2021 05 01.91095 15 47 21.40 +04 21 01.6          16.1 GVEJ016958
     K21H03C KC2021 05 01.91659 15 47 20.17 +04 24 24.1          16.3 GVEJ016958
     K21H03C KC2021 05 01.93245615 47 16.54 +04 33 55.6          16.4 GVEJ016I93
     K21H03C KC2021 05 01.93405415 47 16.18 +04 34 53.1          16.3 GVEJ016I93
     K21H03C KC2021 05 01.93556015 47 15.38 +04 35 35.5          16.3 GVEJ016Z80
     K21H03C KC2021 05 01.93565315 47 15.84 +04 35 50.8          16.3 GVEJ016I93
     K21H03C KC2021 05 01.93903415 47 14.55 +04 37 41.8          16.3 GVEJ016Z80
     K21H03C KC2021 05 01.94250615 47 13.81 +04 39 47.3          16.5 GVEJ016Z80
     K21H03C KC2021 05 01.99818615 47 01.20 +05 13 44.5          16.9 GVEJ016Z80
     K21H03C KC2021 05 02.00067515 47 00.63 +05 15 16.4          16.5 GVEJ016Z80
     K21H03C KC2021 05 02.00322115 47 00.07 +05 16 50.3          16.6 GVEJ016Z80
     K21H03C KC2021 05 02.00399915 47 05.97 +05 19 56.9          16.5 GXEJ016Y00
     K21H03C KC2021 05 02.00463015 47 05.80 +05 20 19.5          16.3 GXEJ016Y00
     K21H03C KC2021 05 02.00525515 47 05.68 +05 20 43.2          16.3 GXEJ016Y00
     K21H03C KC2021 05 02.00588315 46 59.47 +05 18 28.7          16.6 GVEJ016Z80
     K21H03C KC2021 05 02.00619815 47 05.48 +05 21 18.4          16.4 GXEJ016Y00
     K21H03C KC2021 05 02.01344815 46 57.77 +05 23 08.8          16.6 GVEJ016J95
     K21H03C KC2021 05 02.01443215 46 57.54 +05 23 45.2          16.5 GVEJ016J95
     K21H03C KC2021 05 02.01539315 46 57.33 +05 24 20.8          16.5 GVEJ016J95
     K21H03C KC2021 05 02.01856615 46 56.58 +05 26 18.4          16.5 GVEJ016J95
     K21H03C KC2021 05 02.14313 15 46 36.03 +06 45 17.2          16.3 GXEJ016W34
     K21H03C KC2021 05 02.14765 15 46 34.98 +06 48 11.7          16.1 GXEJ016W34
     K21H03C KC2021 05 02.15177 15 46 33.96 +06 50 51.4          16.3 GXEJ016W34
     K21H03C KC2021 05 02.15426 15 46 33.36 +06 52 27.3          16.3 GXEJ016W34
     K21H03C KC2021 05 02.15568 15 46 33.02 +06 53 22.6          16.1 GXEJ016W34
     K21H03C KC2021 05 02.15707 15 46 32.68 +06 54 16.3          16.2 GXEJ016W34
     K21H03C KC2021 05 02.20276115 46 21.75 +07 23 48.1          16.5 VuEJ016H21
     K21H03C KC2021 05 02.20388015 46 21.47 +07 24 32.2          16.6 VuEJ016H21
     K21H03C KC2021 05 02.20499915 46 21.19 +07 25 16.1          16.6 VuEJ016H21
     K21H03C 2C2021 05 02.26517 15 46 02.57 +08 04 49.9          16.1 GVEJ016I22
     K21H03C 2C2021 05 02.26551 15 46 02.51 +08 05 04.3          16.2 GVEJ016I22
     K21H03C  C2021 05 02.51651 15 45 14.85 +10 58 44.4          17.6 RrEJ016P93
     K21H03C  C2021 05 02.51880 15 45 14.24 +11 00 23.9          18.1 RrEJ016P93
     K21H03C  C2021 05 02.52795 15 45 11.77 +11 06 57.9          18.0 RrEJ016P93
     K21H03C  C2021 05 02.53253 15 45 10.48 +11 10 16.9          17.7 RrEJ016P93

Observer details:
703 Catalina Sky Survey.  Observer T. A. Pruyne.  Measurers E. J. Christensen,
    G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A.
    Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D. Rankin, R. L.
    Seaman, F. C. Shelly, K. W. Wierzchos.  0.68-m Schmidt + 10K CCD.
958 Observatoire de Dax.  Observer P. Dupouy.  0.32-m f/4.1 Schmidt-Cassegrain
    + CCD.
E23 Arcadia.  Observer A. Hidas.  0.35-m f/1.9 reflector + CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.76-m f/3.0
    astrograph + CCD.
H36 Sandlot Observatory, Scranton.  Observer G. Hug.  0.56-m reflector + CCD.
I22 Abbey Ridge Observatory, Stillwater Lake.  Observer F. D. Romanov.  0.35-m
    f/6.2 Schmidt-Cassegrain + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer K. W. Wierzchos.
    Measurers E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D.
    Grauer, H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A.
    Pruyne, D. Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.  1.0-m
    reflector + CCD.
I93 St Pardon de Conques.  Observers F. Losse, W. D'Anna.  Measurer F. Losse.
    0.40-m f/3.7 reflector + CCD.
J95 Great Shefford.  Observer P. Birtwhistle.  0.41-m f/6.3 Schmidt-Cassegrain
    + CCD.
P93 Space Tracking and Communications Center, JAXA.  Observers S. Okumura, M.
    Hagino.  1.0-m f/3.0 reflector + CCD, 0.5-m f/2.0 reflector + CCD.
T05 ATLAS-HKO, Haleakala.  Observers L. Denneau, J. Tonry, A. Heinze, H.
    Weiland.  Measurers L. Denneau, J. Tonry, A. Heinze, H. Weiland, A.
    Fitzsimmons, J. Robinson, N. Erasmus.  0.5-m reflector + CCD.
W34 Squirrel Valley Observatory, Columbus.  Observer R. L. Flynn.  0.36-m
    Schmidt-Cassegrain + CCD.
Y00 SONEAR Observatory, Oliveira.  Observers C. Jacques, E. Pimentel, J.
    Barros.  Measurer C. Jacques.  0.45-m f/2.9 reflector + CCD.
Z80 Northolt Branch Observatory.  Observers G. Wells, J. Leuty.  Measurer G.
    Wells.  0.25-m f/8.0 Ritchey-Chretien + CCD.

Orbital elements:
2021 HC3                                            PHA, Earth MOID = 0.0465 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres                   
M 199.58228              (2000.0)            P               Q                  
n   0.83227737     Peri.  132.15101     +0.93304493     +0.19541068             
a   1.1193279      Node   219.55375     -0.20949815     +0.97769964             
e   0.6744972      Incl.   28.31660     +0.29246827     +0.07692909             
P   1.18           H   21.47          G   0.15           U   8                  
Residuals in seconds of arc
210430 T05  0.2+  0.3+    210501 958  0.1+  0.5-    210502 J95  0.1-  0.1+
210430 T05  0.3+  0.1-    210501 958  0.0   0.1-    210502 J95  0.0   0.0
210430 T05  0.4+  0.1-    210501 958  0.3-  0.4+    210502 J95  0.0   0.1-
210501 I52  0.0   0.1-    210501 958  0.4-  0.3+    210502 W34  0.7-  0.6+
210501 I52  0.1-  0.2+    210501 I93  0.4-  0.6+    210502 W34  0.2-  0.3+
210501 I52  0.0   0.1+    210501 I93  0.4-  0.3+    210502 W34  0.5-  0.7+
210501 I52  0.1-  0.2-    210501 Z80  0.7+  0.2+    210502 W34  0.4-  0.3+
210501 H36  0.3-  0.5+    210501 I93  0.2-  0.0     210502 W34  0.3-  0.4+
210501 H36  0.3-  0.4+    210501 Z80  0.3-  0.7+    210502 W34  0.3-  0.3+
210501 H36  0.3-  0.7+    210501 Z80  0.0   0.3+    210502 H21  0.1-  0.5-
210501 H36  0.2-  0.7+    210501 Z80  0.2-  0.2+    210502 H21  0.1-  0.4-
210501 H36  0.2-  0.6+    210502 Z80  0.1-  0.3+    210502 H21  0.1-  0.4-
210501 703  0.0   0.3+    210502 Z80  0.4+  0.2+    210502 I22  1.0-  0.1+
210501 703  0.5-  0.9-    210502 Y00  0.0   0.5+    210502 I22  0.5-  0.7+
210501 703  0.5-  0.1+    210502 Y00  0.4-  0.4-    210502 P93  1.3+  0.1+
210501 703 (0.7+  1.6-)   210502 Y00  0.1-  0.2+    210502 P93  1.2+  0.8+
210501 E23  0.3+  0.1-    210502 Z80  0.6+  0.2+    210502 P93  1.0+  0.4-
210501 E23  0.4+  0.1-    210502 Y00  0.0   0.6+    210502 P93  0.3+  0.4+
210501 E23  0.4+  0.2+    210502 J95  0.2-  0.1+

Ephemeris:
2021 HC3                 a,e,i = 1.12, 0.67, 28                  q = 0.3643
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 04 02    15 49 15.1 -37 00 58   0.5025  1.3624   127.0    35.9    22.1
...
2021 04 17    15 57 02.5 -33 33 26   0.2686  1.2242   141.0    31.1    20.4
...
2021 04 25    15 56 31.7 -25 53 50   0.1512  1.1415   151.9    24.6    18.8
...
2021 05 01    15 49 45.5 -03 33 36   0.07256 1.0750   157.8    20.7    17.0
2021 05 02    15 46 59.2 +05 16 04   0.06222 1.0636   153.0    25.5    16.7
2021 05 03    15 43 01.7 +17 09 52   0.05394 1.0520   143.8    34.5    16.7
...
2021 05 09    05 48 22.9 +80 41 45   0.07788 0.9802    65.8   110.0    20.1
...
2021 05 17    04 18 40.2 +58 26 21   0.1845  0.8780    40.0   132.3    23.5
...
2021 06 01    04 08 18.8 +47 22 36   0.4136  0.6671    25.9   138.3    25.3

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-J16




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