MPEC 2021-P79 : COMET P/2017 S5 = P/2021 L6 (ATLAS)
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M.P.E.C. 2021-P79 Issued 2021 August 8, 04:22 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
COMET P/2017 S5 = P/2021 L6 (ATLAS)
M. Micheli reports the recovery of P/2017 S5 in images taken at Gemini
South Observatory (I11) on June 9 and 12/13 UT.
Observations:
PK21L060* C2021 06 09.07200312 53 33.180-15 45 44.68 24.0 G EP079I11
PK21L060 C2021 06 09.07591012 53 33.179-15 45 43.70 24.7 G EP079I11
PK21L060 C2021 06 09.07981612 53 33.175-15 45 42.75 24.2 G EP079I11
PK21L060 IC2021 06 09.08372212 53 33.165-15 45 41.36 24.1 G EP079I11
PK21L060 C2021 06 12.99975212 53 36.205-15 31 08.01 24.8 G EP079I11
PK21L060 C2021 06 13.00366412 53 36.210-15 31 07.23 24.8 G EP079I11
PK21L060 C2021 06 13.00758212 53 36.241-15 31 06.54 24.9 G EP079I11
PK21L060 C2021 06 13.01147712 53 36.233-15 31 05.62 24.4 G EP079I11
PK21L060 C2021 06 13.01538312 53 36.230-15 31 04.77 24.4 G EP079I11
PK21L060 C2021 06 13.01928912 53 36.237-15 31 03.92 24.7 G EP079I11
Observer details:
I11 Gemini South Observatory, Cerro Pachon. Observers H. H. Hsieh, S.
Margheim, L. Magill. Measurer M. Micheli.
Orbital elements:
P/2017 S5 (ATLAS)
Epoch 2017 July 26.0 TT = JDT 2457960.5
T 2017 July 28.03075 TT Rudenko
q 2.1782331 (2000.0) P Q
n 0.17457404 Peri. 99.94488 +0.97106733 +0.13683438
a 3.1706595 Node 252.39324 -0.19695047 +0.92237538
e 0.3130032 Incl. 11.84908 +0.13505094 +0.36124786
P 5.65
From 438 observations 2017 July 22-2021 June 13, mean residual 0".6.
P/2017 S5 (ATLAS)
Epoch 2023 Apr. 6.0 TT = JDT 2460040.5
T 2023 Mar. 19.32948 TT Rudenko
q 2.1704825 (2000.0) P Q
n 0.17479121 Peri. 99.97810 +0.97103143 +0.13702005
a 3.1680327 Node 252.35011 -0.19711970 +0.92240090
e 0.3148800 Incl. 11.85492 +0.13506218 +0.36111230
P 5.64
From 438 observations 2017 July 22-2021 June 13, mean residual 0".6.
P/2017 S5 (ATLAS)
Epoch 2021 July 5.0 TT = JDT 2459400.5
T 2023 Mar. 19.35024 TT Rudenko
q 2.1718841 (2000.0) P Q
n 0.17484668 Peri. 99.91647 +0.97092745 +0.13778475
a 3.1673627 Node 252.36621 -0.19784778 +0.92222156
e 0.3142926 Incl. 11.85255 +0.13474474 +0.36127934
P 5.64
From 438 observations 2017 July 22-2021 June 13, mean residual 0".6.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2021 07 09 13 00 23.0 -14 38 02 3.5212 3.7123 92.8 15.9 22.4
...
2021 07 24 13 08 47.4 -14 40 13 3.7082 3.6792 80.5 15.8 22.5
...
2021 08 01 13 14 23.9 -14 49 53 3.8049 3.6611 74.2 15.5 22.5
...
2021 08 07 13 19 04.1 -15 00 35 3.8750 3.6473 69.6 15.1 22.6
2021 08 08 13 19 53.0 -15 02 38 3.8864 3.6450 68.8 15.0 22.6
2021 08 09 13 20 42.5 -15 04 46 3.8978 3.6427 68.1 15.0 22.6
...
2021 08 15 13 25 51.8 -15 18 59 3.9641 3.6287 63.6 14.5 22.6
...
2021 08 23 13 33 15.1 -15 41 31 4.0473 3.6097 57.7 13.7 22.6
...
2021 09 07 13 48 31.9 -16 32 49 4.1841 3.5734 47.0 11.9 22.6
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-P79
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