21P/Giacobini-Zinner, 2018-10-14T23:20:44.01 UT, Speed=2.39″/min, PA=164.6Deg, UCAC4, Mag=13.3 nucleus,
+24:55:00N, +75:33:59E,EXP: 1140 secs,12.9µm/12.9µm, 19’X14′, ATIK-414exmono, R Bessell, 1.66″/pix,
C11/f5.5/fl 1548.6mm/D280mm, OBJCRA 07 13 54.182, OBJCDEC= -15 33 58.15, CCDT= -4.9 DegC.
Astrometrica “ADES”, PRISMv10.
Cepheids Astronomy, RBT, INDIA.

Name : C/2018N2(ASASSN)
Perihelion date : 2458798.4623 10-11-2019 23:05:42
Eccentricity : 1.000165
Inclination (°): 77.5312
Node longitude (°): 25.2588
Argument (°): 24.3963
perihelion distance (ua): 3.124639
Absolute Magnitude : 6
Activity Parameter : 4
Julian day : 2458838.17830578
Sun elongation (°) : 101
Geocentric distance (ua) : 2.8075
Speed (arcsec/hour) :13.92
Angle (PA) : 281.84 °
RA speed : -17.6 arcsec/hour DEC : 2.9 arcsec/hour
2019-12-20T15:23:17.373600, UCAC4, Mag=14.2 nucleus
+24:55:00N, +75:33:59E,EXP: 1170 secs,12.9µm/12.9µm, 19’X14′,
SX TRIUS825, R Bessell, 1.66″/pix, CCDT= -10.0 DegC
C11/f5.1/fl 1439mm/D280mm,
OBJCRA 23 32 51.900, OBJCDEC= +39 20 56.21
Astrometrica “ADES”,PRISMv10
Cepheids Observatory, INDIA

Object= Comet C/2017 T2 (PANSTARRS)
DATE-OBS= 2020-01-24T14:29:29
INSTRUME= ARTEMIS CCD ATIK-414ex
EXPOSURE= 1980
CREATOR = Astrometrica
OBJCTRA = 02 26 39.939
OBJCTDEC= +57 28 28.895
SITELAT = +24:55:00:00
SITELONG= +75:33:58:99
FILTERS = ExBB
TELESCOP= C11
FOCAL = 1469.0 mm
DIAMETER= 280.0
OBSERVER= Cepheid Observatory India/Vorion Scientific Observatory India 

Comet C/2019Y4 (ATLAS)
SWCREATE= PRISMv10/Astrometrica
ORIGIN = Cepheid Observatory
OBSERVER= Vora K, Agnihotri V K
DATE-OBS= 2020-04-12T14:53:27.57UT
TELESCOP= C8/1286.0mm/208.0mm+CCD
OBJCTRA = 06 40 26.591(J2000)
OBJCTDEC= +66 39 15.17(J2000)
Cepheid Observatory India
Vorion Scientific Observatory India

Note: Comet imaged using filter from 500nm to 1100nm wavelength (so C2 is expected). Here applied “Sobel contour filter” to analyses comet nucleus (and probably it went into four fragments, may be wrong too..:)). We do not find LS operation correct due to nucleus disintegration and more optical centers. Cheers!

Comet C/2019Y4 ATLAS
DATE = ‘2020-04-05T17:02:47.384200’
SWCREATE= ‘PRISMv10/ Astrometrica’
ORIGIN = ‘Cepheid Observatory’
OBSERVER= ‘Agnihotri V K, Vora K
SITE = ‘+24:55:00:00/ ‘+75:33:58:99
DATE-OBS= ‘2020-04-05T15:29:46.682400UT
EXPOSURE= 120.00000 seconds
INSTRUME= ‘ARTEMIS CCD ATIK-383L’
TELESCOP= ‘C8’ FOCAL = 1286.0 /Focal mm
DIAMETER= 208.0 /Diameter mm
OBJCTRA = ’07 22 31.988(J2000)/ OBJCTDEC= ‘+68 04 02.52(J2000)
Distance into the Sky/extended coma= 1’37”
Position Angle=107.72 Degree
Plotted: MagicPlotPro2.9.3
Cepheid Observatory India/Vorion Scientific Observatory India
Note: Comet seeming to be dimming at +13.8 R mag. more observations are being done. 

Comet C/2020M3(ATLAS) SWCREATE= PRISMv10/AstrometricaORIGIN = Cepheid ObservatoryOBSERVER= Vora K, Agnihotri V K Filter= R Band, Mag= (+) 13.6DATE-OBS= 2020-10-21T20:50:13 UTTELESCOP= C11/1621mm/280mm+CCDOBJCTRA = 05 04 02.949 (J2000)OBJCTDEC= -21 05 34.908 (J2000)Cepheid Observatory IndiaVorion Scientific Observatory India

Comet C/2019Y4 ATLAS
SWCREATE= PRISMv10/Astrometrica
ORIGIN = Cepheid Observatory
OBSERVER= Agnihotri V K, Vora K
DATE-OBS= 2020-04-09T14:43:30.408UT
TELESCOP= C8/1286.0mm/R
DIAMETER= 208.0 // Diameter in mm
Comet filter= (Divided by Average)
Larson-Sekanina= Delta=0.0, Alpha=34 Deg
Elongate nucleus/ Possible fragmentation/forward Jet
Cepheid Observatory India
Vorion Scientific Observatory India