C/2019 Y4 ( ATLAS )

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Updated on May 24, 2020

Profile Discovery Date December 28, 2019 Magnitude 19.6 mag Discoverer Asteroid Terrestrial-Impact Last Alert System (ATLAS) search program Pictures

Orbital Elements C/2019 Y4-A (ATLAS) Epoch 2020 May 31.0 TT = JDT 2459000.5 T 2020 May 31.04040 TT Spoto q 0.2507919 (2000.0) P Q z -0.0068695 Peri. 177.22357 +0.48490396 +0.62126451 +/-0.0003961 Node 120.95924 -0.81559621 +0.57530697 e 1.0017228 Incl. 45.87408 -0.31570708 -0.53202660 From 652 observations 2020 Mar. 23-Apr. 20, mean residual 1".0. C/2019 Y4-B (ATLAS) Epoch 2020 May 31.0 TT = JDT 2459000.5 T 2020 May 31.02165 TT Spoto q 0.2525301 (2000.0) P Q z +0.0012233 Peri. 177.38004 +0.48129947 +0.62625146 +/-0.0001352 Node 120.62540 -0.81662843 +0.57462198 e 0.9996911 Incl. 45.45776 -0.31854173 -0.52689533 From 815 observations 2020 Mar. 31-May 10, mean residual 1".0. C/2019 Y4-C (ATLAS) Epoch 2020 May 31.0 TT = JDT 2459000.5 T 2020 May 30.99561 TT Spoto q 0.2519620 (2000.0) P Q z -0.0100792 Peri. 177.25584 +0.48054544 +0.62517957 +/-0.0010647 Node 120.65888 -0.81760632 +0.57301267 e 1.0025396 Incl. 45.63797 -0.31716871 -0.52991224 From 450 observations 2020 Apr. 6-May 2, mean residual 1".1. C/2019 Y4-D (ATLAS) Epoch 2020 May 31.0 TT = JDT 2459000.5 T 2020 May 31.12426 TT Spoto q 0.2601438 (2000.0) P Q n 0.01807734 Peri. 178.26197 +0.47553855 +0.64334047 a 14.3784825 Node 119.65868 -0.81520531 +0.57860127 e 0.9819074 Incl. 43.66455 -0.33061063 -0.50133184 P 54.5 From 83 observations 2020 Apr. 9-21, mean residual 0".9. C/2019 Y4 (ATLAS) Epoch 2020 May 31.0 TT = JDT 2459000.5 T 2020 May 31.02666 TT Spoto q 0.2528989 (2000.0) P Q z +0.0082462 Peri. 177.39716 +0.48062314 +0.62720512 Node 120.57130 -0.81687653 +0.57439269 e 0.9979145 Incl. 45.38316 -0.31892652 -0.52601025 From 1626 observations 2019 Dec. 20-2020 Apr. 3, mean residual 0".6. Nongravitational parameters A1 = +16.16, A2 = -2.1739.

Finding Charts

Magnitudes Graph m1 = -0.5 + 5 log d + 36 log r [ ,-71] ( - 2020 Mar. 21) m1 = 9.7 + 5 log d + 4 log r(t + 67) [-71, 0] (2020 Mar. 21 - 2020 May 31) m1 = 16.5 + 5 log d + 10.0 log r [ 0, ] (2020 May 31 - ) * Gray curve is: m1 = 5.5 + 5 log d + 10.0 log r

The orbital elements are published on M.P.E.C. 2020-K131. The charts are made with StellaNavigator Ver.10 (AstroArts). The magnitudes graphs are made with Comet for Windows.