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MPC_20151225

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M.P.C. 97498 2015 DEC. 25<br />

P/2015 W2 (Catalina)<br />

Epoch 2015 Sept. 15.0 TT = JDT 2457280.5<br />

T 2015 Sept. 30.76503 TT <strong>MPC</strong>W<br />

q 2.6778260 (2000.0) P Q<br />

n 0.04974421 ω 117.57658 +0.60142183 −0.77758223<br />

a 7.3221901 Ω 294.25666 +0.64355508 +0.60758398<br />

e 0.6342862 i 11.60864 +0.47342226 +0.16188754<br />

P 19.8<br />

From 156 observations 2015 Nov. 21–Dec. 18, mean residual 0 ′′ .5.<br />

P/2015 X1 (PANSTARRS)<br />

Epoch 2015 Oct. 25.0 TT = JDT 2457320.5<br />

T 2015 Oct. 10.67128 TT <strong>MPC</strong>W<br />

q 2.1035529 (2000.0) P Q<br />

n 0.14254612 ω 219.02793 +0.93029036 −0.36086808<br />

a 3.6293800 Ω 161.79123 +0.36654442 +0.90748271<br />

e 0.4204099 i 12.16227 +0.01431890 +0.21505665<br />

P 6.91<br />

From 55 observations 2015 Aug. 12–Dec. 8, mean residual 0 ′′ .4.<br />

C/2015 XY 1 (Lemmon)<br />

T 2018 Mar. 30.39460 TT <strong>MPC</strong>W<br />

q 8.1401464 (2000.0) P Q<br />

ω 193.26901 +0.00169842 +0.86376760<br />

Ω 281.33831 +0.95799583 +0.14309840<br />

e 1.0 i 149.07488 +0.28677710 −0.48314426<br />

From 18 observations 2015 Dec. 4–16.<br />

C/2015 X2 (Catalina)<br />

Epoch 2015 Dec. 4.0 TT = JDT 2457360.5<br />

T 2015 Dec. 20.67282 TT <strong>MPC</strong>W<br />

q 1.9047128 (2000.0) P Q<br />

n 0.01567641 ω 41.99757 −0.34092814 −0.09114133<br />

a 15.8114454 Ω 101.09206 +0.37973593 −0.92382919<br />

e 0.8795358 i 72.45346 +0.85998176 +0.37179683<br />

P 62.9<br />

From 36 observations 2015 Dec. 2–8, mean residual 0 ′′ .5.<br />

P/2015 X3 (PANSTARRS)<br />

Epoch 2015 Aug. 6.0 TT = JDT 2457240.5<br />

T 2015 Aug. 7.80510 TT <strong>MPC</strong>W<br />

q 2.8224273 (2000.0) P Q<br />

n 0.08750112 ω 306.88909 +0.84242503 −0.35800108<br />

a 5.0248946 Ω 77.32904 +0.52202019 +0.72741475<br />

e 0.4383111 i 24.37688 −0.13347283 +0.58540842<br />

P 11.3<br />

From 31 observations 2015 Nov. 6–Dec. 10, mean residual 0 ′′ .5.<br />

C/2015 X4 (Elenin)<br />

Epoch 2015 Oct. 25.0 TT = JDT 2457320.5<br />

T 2015 Nov. 4.14888 TT <strong>MPC</strong>W<br />

q 3.4008343 (2000.0) P Q<br />

n 0.01263602 ω 176.48226 +0.18056246 −0.85292287<br />

a 18.2555849 Ω 262.65238 +0.88991977 +0.35374823<br />

e 0.8137099 i 29.59536 +0.41885559 −0.38390724<br />

P 78.0<br />

From 243 observations 2015 Nov. 24–Dec. 20, mean residual 0 ′′ .4.<br />

C/2015 X5 (PANSTARRS)<br />

T 2013 Sept. 8.28556 TT <strong>MPC</strong>W<br />

q 3.8956634 (2000.0) P Q<br />

ω 250.43571 −0.05902200 −0.67262567<br />

Ω 127.88134 −0.08110119 +0.73970183<br />

e 1.0 i 110.84447 −0.99495678 −0.02039383<br />

From 22 observations 2015 Dec. 6–15.<br />

P/2015 X6 (PANSTARRS)<br />

T 2016 Mar. 10.50832 TT <strong>MPC</strong>W<br />

q 2.3009867 (2000.0) P Q<br />

n 0.21868786 ω 326.19340 +0.28535842 −0.95540485<br />

a 2.7284726 Ω 107.12569 +0.89599179 +0.23778957<br />

e 0.1566759 i 4.55980 +0.34024887 +0.17509337<br />

P 4.51<br />

From 30 observations 2015 Dec. 7–17.<br />

C/2015 X7 (ATLAS)<br />

T 2016 Aug. 3.50357 TT <strong>MPC</strong>W<br />

q 3.7517100 (2000.0) P Q<br />

ω 348.30929 −0.67572626 −0.49064671<br />

Ω 139.56372 +0.72605067 −0.57202502<br />

e 1.0 i 58.01661 +0.12745372 +0.65730752<br />

From 35 observations 2015 Dec. 12–19.<br />

C/2015 X8 (NEOWISE)<br />

Epoch 2015 Oct. 25.0 TT = JDT 2457320.5<br />

T 2015 Oct. 26.58759 TT <strong>MPC</strong>W<br />

q 1.2223806 (2000.0) P Q<br />

z −0.0068558 ω 23.87267 −0.96869404 +0.23412550<br />

±0.0354437 Ω 191.31266 +0.09793651 +0.66599967<br />

e 1.0083804 i 155.10831 +0.22812344 +0.70825820<br />

From 34 observations 2015 Dec. 14–21, mean residual 0 ′′ .8.<br />

C/2015 Y1 (LINEAR)<br />

T 2016 May 15.93496 TT <strong>MPC</strong>W<br />

q 2.5019994 (2000.0) P Q<br />

ω 25.24373 −0.74289570 +0.10330882<br />

Ω 135.72592 +0.32895363 −0.80415373<br />

e 1.0 i 71.33792 +0.58300556 +0.58537515<br />

From 64 observations 2015 Dec. 16–20.

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