MPEC 2021-H111 : 2021 HQ2
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Read MPEC 2021-H110
Read MPEC 2021-H112
M.P.E.C. 2021-H111 Issued 2021 April 21, 19:28 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 HQ2
Observations:
K21H02Q C2021 04 18.55847616 22 34.681-21 31 54.12 20.01GVEH111F51
K21H02Q* C2021 04 20.43247716 30 03.98 -19 31 14.3 20.41GVEH111G96
K21H02Q C2021 04 20.43784816 30 05.25 -19 30 52.3 20.25GVEH111G96
K21H02Q C2021 04 20.44319716 30 06.49 -19 30 30.4 20.01GVEH111G96
K21H02Q C2021 04 20.44853916 30 07.76 -19 30 08.1 VEH111G96
K21H02Q KC2021 04 20.47815916 30 14.68 -19 28 06.5 19.95GVEH111V06
K21H02Q KC2021 04 20.47993616 30 15.09 -19 27 59.4 19.73GVEH111V06
K21H02Q KC2021 04 20.48171416 30 15.50 -19 27 52.1 19.64GVEH111V06
K21H02Q KC2021 04 20.48349516 30 15.94 -19 27 44.8 19.87GVEH111V06
K21H02Q bC2021 04 20.99157016 32 22.49 -18 52 33.0 20.4 GVEH111L01
K21H02Q bC2021 04 20.99469016 32 23.25 -18 52 20.0 20.4 GVEH111L01
K21H02Q bC2021 04 20.99781216 32 23.98 -18 52 06.8 20.3 GVEH111L01
K21H02Q bC2021 04 21.00093316 32 24.70 -18 51 53.5 20.5 GVEH111L01
K21H02Q bC2021 04 21.00404916 32 25.47 -18 51 40.5 20.4 GVEH111L01
K21H02Q 1C2021 04 21.06404 16 32 39.84 -18 47 28.7 20.1 VVEH111033
K21H02Q 1C2021 04 21.06554 16 32 40.19 -18 47 21.7 19.6 VVEH111033
K21H02Q 1C2021 04 21.06704 16 32 40.54 -18 47 15.5 19.7 VVEH111033
K21H02Q 1C2021 04 21.06858 16 32 40.93 -18 47 09.2 19.9 VVEH111033
K21H02Q KC2021 04 21.33756016 33 48.65 -18 27 53.3 VEH111I52
K21H02Q KC2021 04 21.33993716 33 49.17 -18 27 43.2 VEH111I52
K21H02Q C2021 04 21.35041616 33 51.58 -18 26 58.2 19.7 GVEH111H01
K21H02Q C2021 04 21.35916316 33 53.67 -18 26 20.6 19.7 GVEH111H01
K21H02Q C2021 04 21.36512116 33 55.09 -18 25 54.9 19.6 GVEH111H01
K21H02Q C2021 04 21.37456516 33 57.34 -18 25 14.2 19.8 GVEH111H01
K21H02Q C2021 04 21.38065 16 33 59.11 -18 24 47.9 20.1 GVEH111654
K21H02Q C2021 04 21.40816 16 34 05.68 -18 22 49.0 19.4 GVEH111654
K21H02Q C2021 04 21.43107 16 34 11.15 -18 21 09.9 19.3 GVEH111654
K21H02Q KC2021 04 21.61361 16 34 57.69 -18 07 19.9 19.8 VqEH111E23
K21H02Q KC2021 04 21.62924 16 35 01.39 -18 06 11.1 19.8 VqEH111E23
K21H02Q KC2021 04 21.64486 16 35 05.11 -18 05 02.4 20.3 VqEH111E23
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.
654 Table Mountain Observatory, Wrightwood-PHMC. Observers P. Choi, N. Saini,
C. Zhai, R. Trahan, M. Shao.
E23 Arcadia. Observer A. Hidas. 0.35-m f/1.9 reflector + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith. Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer G. J. Leonard. 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. 1.5-m reflector + 10K CCD.
H01 Magdalena Ridge Observatory, Socorro. Observers W. H. Ryan, E. V. Ryan.
Measurer W. H. Ryan. 2.4-m f/8.9 Ritchey-Chretien + 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.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
V06 Catalina Sky Survey-Kuiper. 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. 1.55-m reflector +
1K CCD.
Orbital elements:
2021 HQ2 Earth MOID = 0.1738 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 302.77646 (2000.0) P Q
n 0.31419491 Peri. 59.61029 +0.08451822 +0.97362326
a 2.1429068 Node 217.14634 -0.99140580 +0.06085392
e 0.5130473 Incl. 20.54625 -0.09985590 +0.21989668
P 3.14 H 21.13 G 0.15 U 9
Residuals in seconds of arc
210418 F51 0.1+ 0.1- 210420 L01 0.0 0.2+ 210421 H01 0.0 0.0
210420 G96 0.4- 0.0 210420 L01 0.2- 0.3+ 210421 H01 0.0 0.0
210420 G96 0.2- 0.1+ 210421 L01 0.6- 0.5+ 210421 H01 0.1+ 0.0
210420 G96 0.3- 0.0 210421 L01 0.2- 0.3+ 210421 H01 0.1+ 0.0
210420 G96 0.1+ 0.4+ 210421 033 0.1+ 0.2- 210421 654 0.0 0.2-
210420 V06 0.0 0.2+ 210421 033 0.0 0.5+ 210421 654 0.1+ 0.0
210420 V06 0.0 0.0 210421 033 0.1- 0.3+ 210421 654 0.2+ 0.0
210420 V06 0.1- 0.0 210421 033 0.2+ 0.0 210421 E23 0.7+ 0.2+
210420 V06 0.2+ 0.1- 210421 I52 0.3+ 0.7- 210421 E23 0.1- 0.7+
210420 L01 0.2- 0.4+ 210421 I52 0.4- 0.8- 210421 E23 0.5- 1.1+
Ephemeris:
2021 HQ2 a,e,i = 2.14, 0.51, 21 q = 1.0435
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 03 22 14 58 43.4 -33 47 57 0.5902 1.4339 127.4 33.5 22.2
...
2021 04 06 15 39 12.4 -30 11 02 0.4193 1.3328 135.6 31.7 21.2
...
2021 04 14 16 05 33.3 -25 32 19 0.3411 1.2814 139.5 30.6 20.6
...
2021 04 20 16 28 18.7 -19 59 59 0.2905 1.2447 141.3 30.3 20.2
2021 04 21 16 32 23.7 -18 51 34 0.2829 1.2387 141.4 30.4 20.2
2021 04 22 16 36 33.9 -17 39 01 0.2756 1.2328 141.5 30.5 20.1
...
2021 04 28 17 03 32.5 -08 50 32 0.2379 1.1986 139.9 32.7 19.8
...
2021 05 06 17 44 49.9 +06 50 57 0.2081 1.1566 131.3 41.0 19.6
...
2021 05 21 19 14 56.1 +36 51 45 0.2231 1.0928 105.4 63.2 20.3
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-H111
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