MPEC 2020-Y98 :
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M.P.E.C. 2020-Y98 Issued 2020 December 23, 02:10 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
IAWN Planetary Defense Exercise: Apophis
As noted in MPEC 2020-W46, the MPC is supporting an International
Asteroid Warning Network (IAWN) planetary defense exercise,
coordinated by Vishnu Reddy (U. Arizona), focused on Apophis during
its upcoming approach. See iawn.net for more information.
To that end, the MPC has treated any reported observations that were
not labeled as (99942) Apophis, or 2004 MN4, as if they were of an unknown
minor planet. As stated, if the criteria for posting to the NEOCP were
satisfied (digest2 score > 65), the observations would be posted to the NEO
Confirmation Page under a temporary designation assigned by the observer(s).
Otherwise, the observations would be inserted into the Isolated Tracklet
File (ITF).
Over the past few weeks, a number of surveys have reported unidentified
observations of Apophis. These observations have all had low digest score.
Yesterday, the NEOWISE team reported N00hp15, an unlabeled Apophis tracklet
with ten observations, spanning more than a day. For the past several months,
the MPC's standard procedure for processingunidentified NEOWISE tracklets
has been to post those with NEO-like orbitsto the NEOCP to encourage
additional observations and to obtain optical magnitudes. That was the case
for N00hp15, which met the criteria for designation thanks to follow-up and
precovery observations.
The Apophis discovery exercise is now complete. We thank the NEO search
and follow up communities for their help. The MPC will revert to normal
processing of Apophisobservations, while the remainder to the IAWN Apophis
exercise continues. The observations below will be regularly published
in the next DOU MPEC.
Apophis campaign observations:
N00hp15* C2020 12 04.44563911 16 39.71 -07 07 33.3 19.35GV 703
N00hp15 C2020 12 04.45098911 16 39.97 -07 07 37.8 18.31GV 703
N00hp15 C2020 12 04.45634011 16 40.19 -07 07 43.2 18.45GV 703
N00hp15 C2020 12 04.46169311 16 40.30 -07 07 47.1 18.33GV 703
N00hp15 C2020 12 07.58091811 19 36.24 -07 54 10.8 18.56oV T05
N00hp15 C2020 12 07.58413911 19 36.39 -07 54 13.4 18.57oV T05
N00hp15 C2020 12 07.59058811 19 36.72 -07 54 19.3 18.36oV T05
N00hp15 C2020 12 07.60351111 19 37.27 -07 54 31.1 18.50oV T05
N00hp15 C2020 12 09.56625311 21 29.94 -08 24 01.8 18.46oV T08
N00hp15 C2020 12 09.57956011 21 30.54 -08 24 13.9 18.26oV T08
N00hp15 C2020 12 09.58787711 21 30.94 -08 24 22.0 18.36oV T08
N00hp15 C2020 12 09.59250811 21 31.15 -08 24 26.2 18.53oV T08
N00hp15 C2020 12 10.63559111 22 30.53 -08 40 13.5 18.24oV T05
N00hp15 C2020 12 10.64203811 22 30.81 -08 40 19.3 18.25oV T05
N00hp15 C2020 12 10.66003611 22 31.60 -08 40 35.5 18.28oV T05
N00hp15 C2020 12 10.66461211 22 31.80 -08 40 39.4 17.79oV T05
N00hp15 C2020 12 11.62243111 23 27.28 -08 55 11.8 19.04cV T05
N00hp15 C2020 12 11.62564011 23 27.37 -08 55 12.8 19.45cV T05
N00hp15 C2020 12 11.63433811 23 27.79 -08 55 21.4 19.41cV T05
N00hp15 C2020 12 11.65489511 23 28.66 -08 55 40.4 19.30cV T05
N00hp15 C2020 12 12.60104611 24 23.442-09 10 00.55 19.10wU F51
N00hp15 C2020 12 12.61304411 24 23.987-09 10 11.66 18.90wU F51
N00hp15 C2020 12 15.43317 11 27 03.85 -09 53 06.9 18.7 GV 703
N00hp15 C2020 12 15.43850 11 27 04.15 -09 53 12.0 19.9 GV 703
N00hp15 C2020 12 15.57884011 27 11.942-09 55 14.67 19.45wU F51
N00hp15 C2020 12 15.60356411 27 13.046-09 55 37.65 19.36wU F51
N00hp15 C2020 12 15.61581511 27 13.583-09 55 49.02 19.34wU F51
N00hp15 C2020 12 16.41599811 27 58.67 -10 08 02.6 18.83GV 703
N00hp15 C2020 12 16.42152911 27 58.94 -10 08 07.7 18.71GV 703
N00hp15 C2020 12 16.42706211 27 59.23 -10 08 13.1 18.69GV 703
N00hp15 C2020 12 16.43259611 27 59.46 -10 08 18.0 18.90GV 703
N00hp15 S2020 12 18.97667 11 30 15.53 -10 46 20.2 19 RL C51
N00hp15 s2020 12 18.97667 1 - 5634.1734 - 2466.2657 - 3038.3924 C51
N00hp15 S2020 12 19.10732 11 30 22.51 -10 48 20.0 L C51
N00hp15 s2020 12 19.10732 1 - 5654.1816 - 2501.9465 - 2971.1902 C51
N00hp15 S2020 12 19.23810 11 30 29.50 -10 50 19.6 L C51
N00hp15 s2020 12 19.23810 1 - 5645.7831 - 2512.1036 - 2978.6411 C51
N00hp15 S2020 12 19.23822 11 30 29.57 -10 50 19.2 L C51
N00hp15 s2020 12 19.23822 1 - 5617.3465 - 2486.4031 - 3053.2209 C51
N00hp15 C2020 12 19.42746111 30 42.02 -10 53 43.0 18.76GV 703
N00hp15 C2020 12 19.43306111 30 42.28 -10 53 48.2 18.96GV 703
N00hp15 C2020 12 19.44425211 30 42.76 -10 53 59.2 18.90GV 703
N00hp15 S2020 12 19.63042 11 30 50.27 -10 56 14.9 L C51
N00hp15 s2020 12 19.63042 1 - 5620.3829 - 2542.3521 - 3001.1135 C51
N00hp15 S2020 12 19.69588 11 30 53.76 -10 57 14.5 L C51
N00hp15 s2020 12 19.69588 1 - 5601.9610 - 2534.3800 - 3042.1402 C51
N00hp15 S2020 12 19.76120 11 30 57.22 -10 58 13.2 L C51
N00hp15 s2020 12 19.76120 1 - 5611.8612 - 2552.3720 - 3008.6092 C51
N00hp15 S2020 12 19.82665 11 31 00.74 -10 59 12.5 L C51
N00hp15 s2020 12 19.82665 1 - 5593.4084 - 2544.3300 - 3049.6200 C51
N00hp15 S2020 12 19.89198 11 31 04.17 -11 00 12.7 L C51
N00hp15 s2020 12 19.89198 1 - 5603.2848 - 2562.3354 - 3016.1773 C51
N00hp15 S2020 12 19.95743 11 31 07.60 -11 01 11.9 L C51
N00hp15 s2020 12 19.95743 1 - 5584.6771 - 2554.1084 - 3057.4996 C51
N00hp15 C2020 12 21.59738111 32 34.679-11 26 24.41 18.52wU F51
N00hp15 C2020 12 21.61064611 32 35.188-11 26 36.60 18.55wU F51
N00hp15 C2020 12 21.61558711 32 35.35 -11 26 40.4 18.45cV T08
N00hp15 C2020 12 21.61744611 32 35.45 -11 26 42.5 18.51cV T08
N00hp15 C2020 12 21.62619811 32 35.78 -11 26 50.7 18.36cV T08
N00hp15 C2020 12 21.63705611 32 36.184-11 27 00.73 18.42wU F51
N00hp15 C2020 12 21.64883711 32 36.58 -11 27 11.0 18.40cV T08
N00hp15 KC2020 12 22.39879011 33 15.17 -11 38 36.9 19.0 Vu H21
N00hp15 HC2020 12 22.40495 11 33 16.14 -11 38 37.4 18.1 Ro 691
N00hp15 HC2020 12 22.41309 11 33 16.48 -11 38 45.2 18.2 Ro 691
N00hp15 HC2020 12 22.42123 11 33 16.86 -11 38 52.9 17.9 Ro 691
N00hp15 KC2020 12 22.42736511 33 16.28 -11 39 02.7 18.6 Vu H21
N00hp15 KC2020 12 22.44166 11 33 17.12 -11 39 14.9 17.9 Rq 734
N00hp15 KC2020 12 22.44985 11 33 17.43 -11 39 22.7 17.6 Rq 734
N00hp15 KC2020 12 22.46611 11 33 18.06 -11 39 37.6 18.2 Rq 734
N00hp15 C2020 12 22.46801811 33 18.64 -11 39 36.4 18.51GV I52
N00hp15 C2020 12 22.47299411 33 18.84 -11 39 40.8 18.32GV I52
N00hp15 C2020 12 22.47797111 33 19.03 -11 39 45.4 18.40GV I52
N00hp15 C2020 12 22.48294811 33 19.22 -11 39 49.9 18.44GV I52
N00hp15 C2020 12 22.50669511 33 20.13 -11 40 11.5 18.70GV G96
N00hp15 C2020 12 22.51185211 33 20.32 -11 40 16.1 18.65GV G96
N00hp15 C2020 12 22.51701011 33 20.52 -11 40 20.8 18.72GV G96
N00hp15 C2020 12 22.52217411 33 20.71 -11 40 25.4 18.75GV G96
N00hp15 C2020 12 22.59329111 33 25.018-11 41 23.45 19.28wU F51
N00hp15 C2020 12 22.60557111 33 25.476-11 41 34.74 19.28wU F51
N00hp15 C2020 12 22.61773311 33 25.925-11 41 45.90 19.31wU F52
N00hp15 C2020 12 22.61785211 33 25.928-11 41 45.97 19.39wU F51
N00hp15 C2020 12 22.62931611 33 26.350-11 41 56.48 19.48wU F52
N00hp15 C2020 12 22.64091911 33 26.772-11 42 07.03 19.51wU F52
N00hp15 C2020 12 22.65251411 33 27.193-11 42 17.50 19.49wU F52
Apophis campaign observer details:
691 Steward Observatory, Kitt Peak-Spacewatch. Observer R. A. Mastaler.
0.9-m f/3 reflector + CCD.
703 Catalina Sky Survey. Observers D. Rankin, R. A. Kowalski, 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, B. Gray.
0.68-m Schmidt + 10K CCD, 1.5-m reflector + 10K CCD.
734 Farpoint Observatory, Eskridge. Observers G. Hug, D. Cromer, D. Goodin,
R. Valentine. Measurer G. Hug. 0.7-m reflector + CCD.
C51 WISE. Observer Near-Earth Object Wide-field Infrared Survey Explorer.
Measurers A. K. Mainzer, J. M. Bauer, T. Grav, J. R. Masiero, R. M. Cutri,
J. W. Dailey, E. Kramer, J. Pittichova, E. L. Wright.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz, M.
Willman. Measurers K. Chambers, S. Chastel, T. de Boer, L. Denneau, J.
Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo,
R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, T. Dukes, T. Lowe, A.
Schultz, M. Willman. Measurers K. Chambers, S. Chastel, T. de Boer, L.
Denneau, J. Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y.
Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. 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. 1.5-m reflector + 10K 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.
I52 Steward Observatory, Mt. Lemmon Station. 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. 1.0-m
reflector + CCD.
T05 ATLAS-HKO, Haleakala. Observers L. Denneau, J. Tonry, A. Heinze, H.
Weiland. Measurers L. Denneau, J. Tonry, A. Heinze, H. Weiland, H.
Flewelling, A. Fitzsimmons, J. Robinson, N. Erasmus. 0.5-m reflector +
CCD.
T08 ATLAS-MLO, Mauna Loa. Observers L. Denneau, J. Tonry, A. Heinze, H.
Weiland. Measurers L. Denneau, J. Tonry, A. Heinze, H. Weiland, H.
Flewelling, A. Fitzsimmons, J. Robinson, N. Erasmus. 0.5-m reflector +
CCD.
Apophis campaign orbital elements:
N00hp15 Earth MOID = 0.00021
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 110.63801 (2000.0) P Q
n 1.11237032 Peri. 126.65068 +0.87143308 +0.48994102
a 0.9225073 Node 204.03971 -0.46656890 +0.81300490
e 0.1915162 Incl. 3.33670 -0.15138642 +0.31461219
P 0.89 H 19.15 G 0.15 U 6
Residuals in seconds of arc
K20C4 703 0.0- 0.3- K20CF F51 0.0+ 0.0+ K20CL T08 0.3- 0.1-
K20C4 703 0.1+ 0.1+ K20CF F51 0.1+ 0.0- K20CM H21 0.0- 0.5-
K20C4 703 0.4- 0.5- K20CG 703 0.2- 0.0- K20CM 691 0.2- 0.0+
K20C4 703 (2.5- 0.4+) K20CG 703 0.0- 0.1+ K20CM 691 0.2- 0.2-
K20C7 T05 0.2+ 0.3- K20CG 703 0.4+ 0.2- K20CM 691 0.5+ 0.3-
K20C7 T05 0.2+ 0.1+ K20CG 703 0.0+ 0.1+ K20CM H21 0.3- 0.2-
K20C7 T05 0.6+ 0.1+ K20CI C51 0.7- 0.8+ K20CM 734 0.2+ 0.2+
K20C7 T05 0.2- 0.1+ K20CJ C51 0.5- 0.1+ K20CM 734 0.0- 0.1-
K20C9 T08 0.2+ 0.3+ K20CJ C51 0.2- 0.8- K20CM 734 0.0- 0.2-
K20C9 T08 0.3- 0.5+ K20CJ C51 0.6+ 0.7- K20CM I52 0.2- 0.3-
K20C9 T08 0.2- 0.1+ K20CJ 703 0.1+ 0.0- K20CM I52 0.1- 0.1-
K20C9 T08 0.2- 0.1+ K20CJ 703 0.3+ 0.0+ K20CM I52 0.1- 0.2-
K20CA T05 0.1+ 0.2- K20CJ 703 0.2+ 0.6- K20CM I52 0.1- 0.1-
K20CA T05 0.0- 0.0- K20CJ C51 0.9- 0.0- K20CM G96 0.0- 0.1-
K20CA T05 0.2- 0.2+ K20CJ C51 0.6- 0.5- K20CM G96 0.1- 0.0+
K20CA T05 0.3- 0.5+ K20CJ C51 0.4- 0.3+ K20CM G96 0.0- 0.0+
K20CB T05 (0.5+ 1.8-) K20CJ C51 0.5+ 0.1+ K20CM G96 0.1- 0.1+
K20CB T05 0.3- 0.2+ K20CJ C51 0.5+ 0.7- K20CM F51 0.0- 0.1+
K20CB T05 0.1+ 0.4- K20CJ C51 0.2+ 0.7- K20CM F51 0.0- 0.1+
K20CB T05 0.6- 0.5- K20CL F51 0.0- 0.0+ K20CM F52 0.0+ 0.0+
K20CC F51 0.0+ 0.0- K20CL F51 0.0+ 0.0+ K20CM F51 0.0- 0.1+
K20CC F51 0.0+ 0.0- K20CL T08 0.1- 0.2+ K20CM F52 0.0+ 0.0-
K20CF 703 0.3- 0.1+ K20CL T08 0.4+ 0.2- K20CM F52 0.0+ 0.0-
K20CF 703 0.4+ 0.0+ K20CL T08 0.4+ 0.4- K20CM F52 0.1+ 0.0+
K20CF F51 0.1- 0.0+ K20CL F51 0.0+ 0.0+
A. U. Tomatic (C) Copyright 2020 MPC M.P.E.C. 2020-Y98
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