MPEC 2021-F67 : COMET C/2021 D2 (ZTF)
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M.P.E.C. 2021-F67 Issued 2021 March 22, 04:36 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 C/2021 D2 (ZTF)
An object detected on Feb. 19 UT by Palomar Mountain - ZTF (I41) was
initially reported as a possible NEO. E. Guido reports it displayed a diffuse
8" coma on Mar. 15 UT in 20 unfiltered 60-sec exposures by iTelescope
Observatory (I89). Additional reports of cometary features are as follows:
OC Date Reporter Coma Tail PA Exposures
Z08 2021-03-18 E. Guido 10" 12x90s
Q11 2021-03-18 H. Sato 7" 10x60s
H06 2021-03-19 H. Sato 8" 14x60s
Q11 2021-03-19 H. Sato 8" 9x60s
Observations:
CK21D020* C2021 02 19.55456920 27 23.29 +27 10 17.7 19.55rUEF067I41
CK21D020 C2021 02 19.55700020 27 23.41 +27 10 19.6 19.41rUEF067I41
CK21D020 C2021 02 19.55943120 27 23.52 +27 10 21.3 19.22rUEF067I41
CK21D020 C2021 02 19.56429120 27 23.76 +27 10 24.6 19.21rUEF067I41
CK21D020 C2021 03 09.52861020 40 44.67 +30 52 58.6 19.24rUEF067I41
CK21D020 C2021 03 09.53108020 40 44.77 +30 53 00.7 19.40rUEF067I41
CK21D020 C2021 03 09.53355020 40 44.88 +30 53 03.0 19.33rUEF067I41
CK21D020 C2021 03 09.53602020 40 44.99 +30 53 05.0 19.30rUEF067I41
CK21D020 C2021 03 09.53850020 40 45.12 +30 53 07.1 19.23rUEF067I41
CK21D020 IC2021 03 10.13289820 41 10.79 +31 01 17.8 19.4 GVEF067L01
CK21D020 IC2021 03 10.15423220 41 11.66 +31 01 36.7 19.5 GVEF067L01
CK21D020 KC2021 03 10.16011220 41 11.96 +31 01 40.8 19.1 GVEF067L01
CK21D020 HC2021 03 10.51140 20 41 27.14 +31 06 33.4 oEF067291
CK21D020 HC2021 03 10.52073 20 41 27.54 +31 06 41.1 18.9 RoEF067291
CK21D020 HC2021 03 10.52528 20 41 27.74 +31 06 45.0 18.9 RoEF067291
CK21D020 C2021 03 11.94992020 42 28.95 +31 26 40.4 19.5 rVEF067N51
CK21D020 C2021 03 11.95383220 42 29.12 +31 26 43.6 19.5 rVEF067N51
CK21D020 C2021 03 11.95777920 42 29.30 +31 26 47.1 19.5 rVEF067N51
CK21D020 C2021 03 11.97483920 42 30.04 +31 27 02.4 19.5 rVEF067N51
CK21D020 C2021 03 11.97855420 42 30.15 +31 27 05.5 19.5 rVEF067N51
CK21D020 1C2021 03 12.17521 20 42 38.57 +31 29 51.0 19.5 VVEF067033
CK21D020 1C2021 03 12.17579 20 42 38.60 +31 29 51.6 18.5 VVEF067033
CK21D020 1C2021 03 12.17636 20 42 38.61 +31 29 51.8 19.1 VVEF067033
CK21D020 HC2021 03 13.15079 20 43 20.21 +31 43 42.1 19.5 GVEF067204
CK21D020 HC2021 03 13.16207 20 43 20.71 +31 43 52.0 VEF067204
CK21D020 1C2021 03 15.19787 20 44 46.87 +32 13 15.6 18.6 GVEF067I89
CK21D020 1C2021 03 15.21079 20 44 47.43 +32 13 26.9 18.6 GVEF067I89
CK21D020 2C2021 03 15.24695520 44 48.919+32 13 58.79 18.9 GVEF067J04
CK21D020 2C2021 03 15.24804620 44 48.982+32 13 59.92 18.8 GVEF067J04
CK21D020 2C2021 03 15.24914720 44 49.013+32 14 01.05 18.6 GVEF067J04
CK21D020 KC2021 03 18.19769 20 46 51.92 +32 57 42.5 19.0 GVEF067Z08
CK21D020 KC2021 03 18.20556 20 46 52.25 +32 57 50.1 18.5 GVEF067Z08
CK21D020 9C2021 03 18.22484 20 46 53.06 +32 58 07.1 19.7 GVEF067G40
CK21D020 9C2021 03 18.24063 20 46 53.65 +32 58 21.6 19.5 GVEF067G40
CK21D020 KC2021 03 18.81522 20 47 17.36 +33 07 02.1 18.4 RqEF067Q11
CK21D020 KC2021 03 18.82240 20 47 17.64 +33 07 08.4 qEF067Q11
CK21D020 |C2021 03 19.44994 20 47 43.40 +33 16 39.8 VEF067H06
CK21D020 |C2021 03 19.45429 20 47 43.59 +33 16 43.7 VEF067H06
CK21D020 |C2021 03 19.45865 20 47 43.80 +33 16 47.9 18.8 GVEF067H06
CK21D020 KC2021 03 19.81251 20 47 58.25 +33 22 11.7 18.4 RqEF067Q11
CK21D020 KC2021 03 19.81791 20 47 58.46 +33 22 16.8 qEF067Q11
CK21D020 KC2021 03 19.82445 20 47 58.73 +33 22 22.7 qEF067Q11
CK21D020 KC2021 03 21.13844 20 48 52.18 +33 42 36.1 19.8 GVEF067K83
CK21D020 KC2021 03 21.14209 20 48 52.34 +33 42 39.7 19.0 GVEF067K83
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.
204 Schiaparelli Observatory. Observer L. Buzzi. 0.84-m f/3.5 reflector +
CCD.
291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD.
G40 Slooh.com Canary Islands Observatory. Observer B. Lutkenhoner. 0.5-m
f/6.8 Corrected Dall-Kirkham + CCD.
H06 iTelescope Observatory, Mayhill. Observer H. Sato. 0.43-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
I41 Palomar Mountain--ZTF. Observers B. T. Bolin, Z. T. F. Collaboration.
Measurers B. T. Bolin, W.-H. Ip, Z.-Y. Lin, F. J. Masci. 1.2-m f/2.4
Schmidt.
I89 iTelescope Observatory, Nerpio. Observers A. Valvasori, E. Guido. 0.32-m
f/8.0 reflector + CCD.
J04 ESA Optical Ground Station, Tenerife. Observer P. Ruiz. Measurers M.
Micheli, R. Kresken, D. Koschny, L. Conversi, A. Knofel, M. Busch, E.
Schwab. 1.0-m f/4.4 reflector + CCD.
K83 Beppe Forti Astronomical Observatory, Montelupo. Observers M. Tombelli,
G. Interrante, T. Bitossi. Measurers M. Tombelli, F. Bernardi, A.
Mazzanti, E. Venticinque. 0.40-m f/8 Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
N51 GROWTH India Telescope, IAO, Hanle. Observers K. Sharma, H. Kumar, J.
Stanzin, V. Bhalerao, G. C. Anupama, S. Barway. Measurer K. Sharma.
0.70-m f/6.5 Corrected Dall-Kirkham + CCD.
Q11 Shinshiro. Observer T. Ikemura. Measurer H. Sato. 0.35-m f/5 reflector
+ CCD.
Z08 Telescope Live, Oria. Observers E. Guido, M. Rocchetto, E. Bryssinck, M.
Fulle, G. Milani, C. Nassef, G. Savini, A. Valvasori. 0.7-m f/8 Ritchey-
Chretien + CCD.
Orbital elements:
C/2021 D2 (ZTF)
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5
T 2022 Feb. 4.18037 TT Rudenko
q 2.9443625 (2000.0) P Q
z +0.0000342 Peri. 125.09167 -0.26419696 -0.52748548
+/-0.0003120 Node 305.69634 +0.15171543 +0.80403361
e 0.9998994 Incl. 83.84535 +0.95246123 -0.27438845
From 44 observations 2021 Feb. 19-Mar. 21, mean residual 0".3.
C/2021 D2 (ZTF)
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5
T 2022 Feb. 4.17515 TT Rudenko
q 2.9450975 (2000.0) P Q
z +0.0001822 Peri. 125.07444 -0.26403472 -0.52753898
+/-0.0003120 Node 305.69470 +0.15147258 +0.80409869
e 0.9994634 Incl. 83.84633 +0.95254487 -0.27409472
From 44 observations 2021 Feb. 19-Mar. 21, mean residual 0".3.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2021 02 20 20 27 43.4 +27 15 15 5.0892 4.4600 46.0 9.2 19.0
...
2021 03 07 20 38 54.4 +30 18 45 4.9193 4.3598 50.8 10.2 18.9
...
2021 03 15 20 44 38.4 +32 10 23 4.8195 4.3069 53.8 10.7 18.8
...
2021 03 21 20 48 46.4 +33 40 27 4.7414 4.2675 56.1 11.2 18.7
2021 03 22 20 49 26.7 +33 56 00 4.7282 4.2609 56.6 11.3 18.7
2021 03 23 20 50 06.8 +34 11 41 4.7149 4.2544 57.0 11.3 18.7
...
2021 03 29 20 54 00.0 +35 48 58 4.6343 4.2152 59.4 11.8 18.6
...
2021 04 06 20 58 49.4 +38 07 02 4.5249 4.1634 62.8 12.3 18.5
...
2021 04 21 21 06 22.5 +42 50 55 4.3188 4.0675 69.0 13.3 18.3
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-F67
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