MPEC 2021-D24 : 2021 DF
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M.P.E.C. 2021-D24 Issued 2021 February 18, 09:42 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
2021 DF
Observations:
K21D00F* C2021 02 17.25778309 02 57.07 +19 37 57.6 19.54GVED024703
K21D00F C2021 02 17.26922909 03 21.47 +19 46 45.8 19.25GVED024703
K21D00F C2021 02 17.27495809 03 33.51 +19 51 09.3 19.01GVED024703
K21D00F KC2021 02 17.29358209 04 13.29 +20 05 26.6 18.13GVED024I52
K21D00F KC2021 02 17.29397109 04 14.11 +20 05 44.5 18.19GVED024I52
K21D00F KC2021 02 17.29435909 04 14.94 +20 06 02.4 18.23GVED024I52
K21D00F KC2021 02 17.29474809 04 15.78 +20 06 19.9 18.47GVED024I52
K21D00F KC2021 02 17.39744909 07 57.41 +21 23 54.6 18.13GVED024I52
K21D00F KC2021 02 17.39784209 07 58.25 +21 24 12.4 18.37GVED024I52
K21D00F KC2021 02 17.39823609 07 59.13 +21 24 30.0 18.31GVED024I52
K21D00F KC2021 02 17.39862809 07 59.99 +21 24 47.5 18.49GVED024I52
K21D00F C2021 02 17.77013 09 22 40.90 +25 56 20.9 18.9 GVED024N88
K21D00F C2021 02 17.77045 09 22 41.61 +25 56 33.9 19.1 GVED024N88
K21D00F C2021 02 17.77078 09 22 42.36 +25 56 48.2 19.5 GVED024N88
K21D00F C2021 02 17.77109 09 22 43.11 +25 57 01.8 18.8 GVED024N88
K21D00F C2021 02 17.77138 09 22 43.68 +25 57 13.4 19.0 GVED024N88
K21D00F KC2021 02 17.79217909 23 55.51 +26 10 41.4 18.4 GVED024587
K21D00F KC2021 02 17.79289909 23 57.17 +26 11 12.2 18.5 GVED024587
K21D00F KC2021 02 17.79305809 23 57.54 +26 11 19.0 18.5 GVED024587
K21D00F KC2021 02 17.79333609 23 58.18 +26 11 30.9 18.3 GVED024587
K21D00F KC2021 02 17.82203509 25 04.07 +26 31 57.8 VED024204
K21D00F KC2021 02 17.82845409 25 18.69 +26 36 31.1 VED024204
K21D00F KC2021 02 17.83486309 25 33.34 +26 41 03.5 18.9 GVED024204
K21D00F KC2021 02 17.89972009 28 00.33 +27 26 31.8 18.8 GVED024203
K21D00F KC2021 02 17.91125709 28 26.39 +27 34 31.6 19.2 GVED024203
K21D00F KC2021 02 17.93925809 29 29.52 +27 53 46.5 18.9 GVED024203
K21D00F 1C2021 02 18.07198 09 34 31.15 +29 21 51.6 19.4 VVED024033
K21D00F 1C2021 02 18.07238 09 34 32.09 +29 22 07.4 19.5 VVED024033
K21D00F 1C2021 02 18.07278 09 34 33.02 +29 22 23.1 19.3 VVED024033
K21D00F KC2021 02 18.15606809 38 23.53 +30 16 24.8 18.5 VqED024U55
K21D00F KC2021 02 18.17205409 39 00.75 +30 26 52.2 18.9 VqED024U55
K21D00F KC2021 02 18.33149709 45 03.70 +32 10 17.8 19.68GVED024I52
K21D00F KC2021 02 18.33202709 45 04.93 +32 10 36.8 18.32GVED024I52
K21D00F KC2021 02 18.33252809 45 06.10 +32 10 55.7 19.09GVED024I52
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg. Observers S. Melnikov, C.
Hoegner, U. Laux, F. Ludwig, B. Stecklum. Measurer B. Stecklum. 1.34-m
f/3 Schmidt + CCD.
203 GiaGa Observatory. Observers S. Foglia, G. Galli. Measurer G. Galli.
0.36-m f/5.76 Schmidt-Cassegrain + CCD.
204 Schiaparelli Observatory. Observer L. Buzzi. 0.84-m f/3.5 reflector +
CCD.
587 Sormano. Observers E. Colzani, E. Valli. Measurer P. Sicoli. 0.5-m
f/6.8 reflector + CCD.
703 Catalina Sky Survey. Observer R. A. Kowalski. 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.
I52 Steward Observatory, Mt. Lemmon Station. Observer D. Rankin. 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.
N88 Xingming Observatory #3, Nanshan. Observer X. Gao. Measurer Q.-Z. Ye.
0.6-m f/8 Ritchey-Chretien + CCD.
U55 Golden Ears Observatory, Maple Ridge. Observers B. Kumar, T. Burt.
Measurer B. Kumar. 0.36-m f/7 Schmidt-Cassegrain + CCD.
Orbital elements:
2021 DF Earth MOID = 0.0195 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Bell
M 333.10758 (2000.0) P Q
n 0.52988002 Peri. 347.15802 -0.71368612 -0.68513945
a 1.5124616 Node 148.00730 +0.66453006 -0.72803755
e 0.3376939 Incl. 15.96515 +0.22147667 -0.02335089
P 1.86 H 26.45 G 0.15 U 7
Residuals in seconds of arc
210217 703 0.6+ 0.2+ 210217 N88 0.1- 0.0- 210217 203 0.0+ 0.0+
210217 703 1.2+ 0.2- 210217 N88 0.1+ 0.5+ 210217 203 0.1+ 0.3-
210217 703 1.0- 0.8- 210217 N88 0.9+ 0.9+ 210218 033 0.2- 0.5-
210217 I52 0.1- 0.6+ 210217 N88 0.1- 0.2+ 210218 033 0.3+ 0.1-
210217 I52 0.2- 0.6+ 210217 587 0.0- 0.0+ 210218 033 0.4+ 0.0-
210217 I52 0.2- 0.7+ 210217 587 0.1+ 0.1- 210218 U55 1.1- 0.1+
210217 I52 0.1- 0.3+ 210217 587 0.1+ 0.1- 210218 U55 (4.2- 2.8-)
210217 I52 0.1+ 0.3+ 210217 587 0.1+ 0.1- 210218 I52 0.4- 0.3+
210217 I52 0.2- 0.5+ 210217 204 0.2+ 0.1+ 210218 I52 0.1- 0.2-
210217 I52 0.0+ 0.5+ 210217 204 0.3- 0.2+ 210218 I52 0.4+ 0.3+
210217 I52 0.0+ 0.4+ 210217 204 0.2+ 0.3+
210217 N88 0.0- 0.7+ 210217 203 0.3- 0.5-
Ephemeris:
2021 DF a,e,i = 1.51, 0.34, 16 q = 1.0017
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 01 19 04 50 38.0 -50 16 55 0.1599 1.0172 97.5 73.5 25.1
...
2021 02 03 05 22 51.8 -46 24 34 0.08103 1.0021 99.4 76.0 23.7
...
2021 02 11 06 26 15.3 -34 30 23 0.03902 1.0031 113.4 64.6 21.7
...
2021 02 17 08 53 11.1 +16 18 22 0.02076 1.0080 162.9 16.8 18.9
2021 02 18 09 31 49.8 +28 36 22 0.02193 1.0091 161.4 18.2 19.1
2021 02 19 10 12 03.7 +38 21 28 0.02444 1.0104 153.0 26.4 19.6
...
2021 02 25 13 08 54.6 +56 08 11 0.05191 1.0197 124.0 53.6 22.0
...
2021 03 05 14 24 01.3 +56 36 29 0.09562 1.0372 116.0 59.3 23.6
...
2021 03 20 14 50 42.8 +54 44 21 0.1780 1.0833 115.1 56.4 24.9
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-D24
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