MPEC 2021-H51 : 2021 HN
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M.P.E.C. 2021-H51 Issued 2021 April 18, 18:21 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 HN
Observations:
K21H00N FC2021 04 16.98450 14 01 56.83 +25 07 17.4 19.4 RoEH051K88
K21H00N FC2021 04 16.98518 14 01 56.82 +25 07 20.9 19.5 RoEH051K88
K21H00N* C2021 04 17.30701314 02 44.17 +25 46 02.1 19.89GVEH051G96
K21H00N C2021 04 17.31287714 02 44.11 +25 46 49.8 20.16GVEH051G96
K21H00N C2021 04 17.31874914 02 44.03 +25 47 37.5 19.91GVEH051G96
K21H00N C2021 04 17.32462414 02 43.97 +25 48 25.1 20.01GVEH051G96
K21H00N KC2021 04 17.43362414 02 44.26 +26 03 24.2 19.62GVEH051I52
K21H00N KC2021 04 17.43446614 02 44.29 +26 03 31.2 19.46GVEH051I52
K21H00N KC2021 04 17.43530714 02 44.31 +26 03 38.3 19.63GVEH051I52
K21H00N KC2021 04 17.47931 14 02 46.60 +26 09 57.5 20.0 GVEH051291
K21H00N KC2021 04 17.48072 14 02 46.70 +26 10 09.8 19.8 GVEH051291
K21H00N KC2021 04 17.48214 14 02 46.79 +26 10 22.0 19.8 GVEH051291
K21H00N KC2021 04 17.89135214 05 05.81 +27 32 17.2 18.7 GVEH051203
K21H00N KC2021 04 17.89962414 05 04.98 +27 34 35.4 18.8 GVEH051595
K21H00N KC2021 04 17.90824014 05 06.30 +27 36 57.2 18.8 GVEH051595
K21H00N KC2021 04 17.91497314 05 09.58 +27 38 45.3 18.9 GVEH051203
K21H00N KC2021 04 17.91685314 05 07.53 +27 39 19.2 18.6 GVEH051595
K21H00N hC2021 04 17.91715014 05 07.62 +27 39 30.9 19.2 VdEH051L01
K21H00N hC2021 04 17.91870614 05 07.85 +27 39 56.9 19.0 VdEH051L01
K21H00N hC2021 04 17.92182214 05 08.26 +27 40 48.6 18.9 VdEH051L01
K21H00N hC2021 04 17.92312014 05 08.46 +27 41 09.8 18.7 VdEH051L01
K21H00N KC2021 04 17.93184614 05 16.93 +27 42 42.8 VEH051Z43
K21H00N KC2021 04 17.93822614 05 18.09 +27 44 32.7 VEH051Z43
K21H00N KC2021 04 17.94437014 05 19.22 +27 46 17.9 VEH051Z43
K21H00N KC2021 04 17.99463914 05 20.27 +28 01 57.8 18.8 GVEH051104
K21H00N KC2021 04 17.99762814 05 20.67 +28 02 51.5 18.8 GVEH051104
K21H00N KC2021 04 18.00061114 05 21.09 +28 03 45.5 18.8 GVEH051104
K21H00N C2021 04 18.24662914 07 38.74 +29 36 57.1 18.63GVEH051I52
K21H00N C2021 04 18.24682114 07 38.82 +29 37 03.1 18.53GVEH051I52
K21H00N C2021 04 18.24701714 07 38.88 +29 37 09.0 18.22GVEH051I52
K21H00N C2021 04 18.24720914 07 38.91 +29 37 14.0 18.78GVEH051I52
K21H00N C2021 04 18.33120314 08 04.44 +30 19 18.5 18.70GVEH051703
K21H00N C2021 04 18.33644414 08 06.19 +30 22 04.3 18.51GVEH051703
K21H00N C2021 04 18.34169614 08 07.84 +30 24 53.5 19.02GVEH051703
K21H00N C2021 04 18.34693814 08 09.71 +30 27 45.8 18.81GVEH051703
K21H00N C2021 04 18.34721 14 08 16.51 +30 27 29.6 18.9 GVEH051654
K21H00N C2021 04 18.37508 14 08 26.57 +30 43 08.8 18.4 GVEH051654
K21H00N C2021 04 18.39588 14 08 34.70 +30 55 18.1 18.4 GVEH051654
K21H00N C2021 04 18.62902814 13 03.49 +34 02 14.2 18.0 VqEH051900
K21H00N C2021 04 18.63218614 13 06.54 +34 05 35.9 18.5 VqEH051900
K21H00N C2021 04 18.63534614 13 09.59 +34 08 58.7 18.5 VqEH051900
Observer details:
104 San Marcello Pistoiese. Observers P. Bacci, M. Maestripieri. Measurers
P. Bacci, L. Tesi, G. Fagioli. 0.60-m reflector + CCD.
203 GiaGa Observatory. Observers S. Foglia, G. Galli. Measurer G. Galli.
0.36-m f/5.76 Schmidt-Cassegrain + CCD.
291 LPL/Spacewatch II. Observer T. H. Bressi. 1.8-m f/2.7 reflector + CCD.
595 Farra d'Isonzo. Observer E. Pettarin. 0.61-m f/4.5 reflector + CCD.
654 Table Mountain Observatory, Wrightwood-PHMC. Observers P. Choi, N. Saini,
C. Zhai, R. Trahan, M. Shao.
703 Catalina Sky Survey. Observer H. Groeller. 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.
900 Moriyama. Observer Y. Ikari. 0.26-m f/7.0 reflector + CCD.
G96 Mt. Lemmon Survey. 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. 1.5-m reflector +
10K CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer H. Groeller. 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.
K88 GINOP-KHK, Piszkesteto. Observer K. Sarneczky. Measurers K.
Sarneczky, T. Csorgei, S. Kurti, M. Masek. 0.60-m Schmidt + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, M. Himelreich.
Measurer K. Korlevic. 1.0-m f/2.9 reflector + CCD.
Z43 Landehen. Observer C. Ratinaud. 0.25-m f/4.7 reflector + CCD + GPS-
tagged video.
Orbital elements:
2021 HN Earth MOID = 0.0022 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 308.72859 (2000.0) P Q
n 0.31091497 Peri. 242.54612 +0.01865927 +0.99062767
a 2.1579512 Node 29.48753 -0.79257238 +0.09715412
e 0.6329701 Incl. 15.95536 -0.60949230 -0.09600987
P 3.17 H 26.95 G 0.15 U 7
Residuals in seconds of arc
210416 K88 0.3- 0.2+ 210417 595 0.7+ 0.3+ 210418 I52 0.3+ 0.1+
210416 K88 0.4- 0.3- 210417 203 0.0 0.3+ 210418 I52 0.3+ 0.5+
210417 G96 0.2+ 0.1- 210417 595 0.1+ 0.1+ 210418 I52 0.1- 0.0
210417 G96 0.1+ 0.0 210417 L01 0.0 0.4+ 210418 703 0.8- 1.1+
210417 G96 0.0 0.1+ 210417 L01 0.1+ 0.6+ 210418 703 0.0 1.0-
210417 G96 0.0 0.0 210417 L01 0.4- 0.5+ 210418 703 1.0- 1.6-
210417 I52 0.1+ 0.1- 210417 L01 0.2- 0.1+ 210418 703 0.6+ 0.1-
210417 I52 0.2+ 0.1- 210417 Z43 0.2- 0.3- 210418 654 0.1+ 0.1+
210417 I52 0.1+ 0.1- 210417 Z43 0.1+ 0.4+ 210418 654 0.0 0.2-
210417 291 0.2+ 0.2- 210417 Z43 (0.7+ 0.2-) 210418 654 0.2- 0.2-
210417 291 0.2+ 0.1- 210417 104 0.1+ 0.1- 210418 900 0.1- 0.2+
210417 291 0.1+ 0.1- 210417 104 0.3- 0.3- 210418 900 0.1+ 0.5+
210417 203 0.3- 0.1+ 210418 104 0.5- 0.0 210418 900 0.2- 0.1+
210417 595 0.3+ 0.6- 210418 I52 0.0 0.5-
Ephemeris:
2021 HN a,e,i = 2.16, 0.63, 16 q = 0.7920
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 03 19 13 51 42.0 +19 12 43 0.3435 1.2938 145.7 25.7 26.4
...
2021 04 03 13 57 08.4 +21 00 54 0.1727 1.1510 148.8 26.7 24.6
...
2021 04 11 13 58 44.8 +22 08 36 0.08716 1.0770 148.0 29.5 23.1
...
2021 04 17 14 02 01.3 +25 11 05 0.02435 1.0236 144.0 35.2 20.4
2021 04 18 14 05 24.1 +28 06 13 0.01397 1.0149 140.8 38.7 19.3
2021 04 19 14 33 51.4 +46 42 50 0.0038301.0063 121.3 58.5 17.0
...
2021 04 25 01 56 32.9 -20 07 03 0.05926 0.9570 33.4 144.7 28.2
...
2021 05 03 01 57 57.0 -20 22 31 0.1440 0.8980 37.4 137.0 29.0
...
2021 05 18 02 03 01.4 -17 46 51 0.3091 0.8181 44.1 120.7 28.9
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-H51
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