G. V. Williams (小惑星センター)の通報によると、5月29日、Pan-STARRS 1サーベイでHaleakala
にある1.8-m Ritchey-Chretien 反射望遠鏡と6月1日、Mt. Lemmonサーベイの1.5-m 反射望遠鏡
(観測者:B. M. Africano)による観測からP/2000 S4 (IAUCs 7502, 7553を参照)を検出した。
外観の詳細は明らかにされなかった。
MPC 102107のWilliamsの予報に対する修正値は、Delta(T) = +0.25 dayであった。
検出位置は次のとおり、
2019 UT R.A. (2000) Decl. Mag.
May 29.57499 21 49 39.57 +11 59 02.4 21.6
29.58397 21 49 40.14 +11 59 06.1 21.5
29.59291 21 49 40.70 +11 59 09.6 21.5
29.60190 21 49 41.27 +11 59 13.2 21.6
June 1.44032 21 52 43.33 +12 17 55.0 21.0
1.44551 21 52 43.71 +12 17 56.7 20.8
1.45070 21 52 44.00 +12 17 58.3 21.1
連結軌道要素と位置推算表は次のとおり、
Orbital elements:
P/2000 S4 (LINEAR-Spacewatch)
Epoch 2000 Oct. 23.0 TT = JDT 2451840.5
T 2000 Oct. 19.09802 TT MPCW
q 2.2654571 (2000.0) P Q
n 0.05184240 Peri. 172.32444 +0.97573820 +0.21441300
a 7.1232685 Node 174.64378 -0.21748396 +0.97250158
e 0.6819638 Incl. 28.32774 -0.02521288 -0.09092711
P 19.01
From 40 observations 2000 Sept. 1-2019 June 1, mean residual 0".5.
P/2000 S4 (LINEAR-Spacewatch)
Epoch 2019 Oct. 4.0 TT = JDT 2458760.5
T 2019 Sept. 26.88873 TT MPCW
q 2.2653510 (2000.0) P Q
n 0.05196999 Peri. 173.09660 +0.97549386 +0.21394051
a 7.1116050 Node 173.79232 -0.21767130 +0.97244223
e 0.6814571 Incl. 28.37715 -0.03210833 -0.09265834
P 18.96
From 40 observations 2000 Sept. 1-2019 June 1, mean residual 0".5.
P/2000 S4 (LINEAR-Spacewatch)
Epoch 2038 Oct. 24.0 TT = JDT 2465720.5
T 2038 Oct. 9.57020 TT MPCW
q 2.2696953 (2000.0) P Q
n 0.05188382 Peri. 173.29445 +0.97622994 +0.21056110
a 7.1194767 Node 173.79337 -0.21429668 +0.97320166
e 0.6811991 Incl. 28.37022 -0.03243504 -0.09242590
P 19.00
From 40 observations 2000 Sept. 1-2019 June 1, mean residual 0".5.
P/2000 S4 (LINEAR-Spacewatch)
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5
T 2019 Sept. 26.85642 TT MPCW
q 2.2654386 (2000.0) P Q
n 0.05194630 Peri. 173.08266 +0.97545096 +0.21414145
a 7.1137667 Node 173.79483 -0.21786887 +0.97239964
e 0.6815416 Incl. 28.37591 -0.03207135 -0.09264118
P 18.97
From 40 observations 2000 Sept. 1-2019 June 1, mean residual 0".5.
Ephemeris:
P/2000 S4 (LINEAR-Spacewatch)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1
2019 05 03 21 17 31.5 +08 39 36 2.6532 2.6409 78.3 21.9 22.3
...
2019 05 18 21 36 25.2 +10 36 20 2.4282 2.5746 86.6 23.1 22.0
...
2019 05 26 21 45 42.6 +11 34 30 2.3095 2.5411 91.2 23.5 21.9
...
2019 06 01 21 52 15.3 +12 15 04 2.2216 2.5170 94.7 23.7 21.7
2019 06 02 21 53 18.5 +12 21 31 2.2071 2.5131 95.3 23.7 21.7
2019 06 03 21 54 20.9 +12 27 52 2.1926 2.5091 95.9 23.7 21.7
...
2019 06 09 22 00 20.5 +13 03 35 2.1064 2.4862 99.6 23.7 21.6
...
2019 06 17 22 07 37.0 +13 43 45 1.9941 2.4570 104.7 23.6 21.4
...
2019 07 02 22 18 43.9 +14 28 27 1.7940 2.4070 115.0 22.5 21.1
(CBET 4633、MPEC 2019-L11)