메타데이터
| 항목 |
값 |
| Designation |
P/2018 L4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-07-31T20:14:06.267840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:44Z |
| Obs used |
129 |
| NEO |
- |
| M1 |
15.000 |
| K1 |
21.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-06-08T12:14:11.040000Z |
| Discovery magnitude (MPC) |
21.00 i |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-06-29.0000000 |
| e |
0.66033053 |
| q (au) |
1.676234 |
| a (au) |
4.934898 |
| i (deg) |
26.625477 |
| Ω (om, deg) |
145.193041 |
| ω (w, deg) |
140.432575 |
| M (ma, deg) |
357.047219 |
밝기
산란 + 전체 선형
$$
M_a = (17.644 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.644 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.692 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
08:18:05.92 |
+12:44:32.5 |
HIP 40686 |
11.49 |
| 2026-06-01 12:00 |
08:18:18.56 |
+12:44:35.5 |
HIP 40686 |
10.90 |
| 2026-06-02 00:00 |
08:18:31.28 |
+12:44:38.1 |
HIP 40686 |
11.16 |
| 2026-06-02 12:00 |
08:18:44.09 |
+12:44:40.1 |
HIP 40686 |
12.23 |
| 2026-06-03 00:00 |
08:18:56.98 |
+12:44:41.6 |
HIP 40686 |
13.94 |
| 2026-06-03 12:00 |
08:19:09.94 |
+12:44:42.5 |
HIP 40686 |
16.09 |
| 2026-06-04 00:00 |
08:19:22.99 |
+12:44:43.0 |
HIP 40686 |
18.55 |
| 2026-06-04 12:00 |
08:19:36.12 |
+12:44:42.9 |
HIP 40686 |
21.21 |
| 2026-06-05 00:00 |
08:19:49.33 |
+12:44:42.4 |
HIP 40686 |
24.02 |
| 2026-06-05 12:00 |
08:20:02.61 |
+12:44:41.3 |
HIP 40956 |
21.67 |
| 2026-06-06 00:00 |
08:20:15.98 |
+12:44:39.7 |
HIP 40956 |
18.49 |
| 2026-06-06 12:00 |
08:20:29.42 |
+12:44:37.6 |
HIP 40956 |
15.32 |
| 2026-06-07 00:00 |
08:20:42.94 |
+12:44:34.9 |
HIP 40956 |
12.20 |
| 2026-06-07 12:00 |
08:20:56.54 |
+12:44:31.8 |
HIP 40956 |
9.18 |
| 2026-06-08 00:00 |
08:21:10.21 |
+12:44:28.1 |
HIP 40956 |
6.46 |
| 2026-06-08 12:00 |
08:21:23.95 |
+12:44:24.0 |
HIP 40956 |
4.63 |
| 2026-06-09 00:00 |
08:21:37.78 |
+12:44:19.3 |
HIP 40956 |
4.88 |
| 2026-06-09 12:00 |
08:21:51.67 |
+12:44:14.1 |
HIP 40956 |
7.00 |
| 2026-06-10 00:00 |
08:22:05.64 |
+12:44:08.4 |
HIP 40956 |
9.89 |
| 2026-06-10 12:00 |
08:22:19.68 |
+12:44:02.2 |
HIP 40956 |
13.04 |
| 2026-06-11 00:00 |
08:22:33.79 |
+12:43:55.5 |
HIP 40956 |
16.33 |
| 2026-06-11 12:00 |
08:22:47.98 |
+12:43:48.3 |
HIP 40956 |
19.68 |
| 2026-06-12 00:00 |
08:23:02.23 |
+12:43:40.6 |
HIP 40956 |
23.09 |
| 2026-06-12 12:00 |
08:23:16.56 |
+12:43:32.4 |
HIP 40956 |
26.54 |
| 2026-06-13 00:00 |
08:23:30.95 |
+12:43:23.7 |
HIP 40956 |
30.01 |
| 2026-06-13 12:00 |
08:23:45.42 |
+12:43:14.5 |
HIP 40956 |
33.51 |
| 2026-06-14 00:00 |
08:23:59.95 |
+12:43:04.8 |
HIP 41247 |
31.97 |
| 2026-06-14 12:00 |
08:24:14.55 |
+12:42:54.6 |
HIP 41247 |
30.46 |
| 2026-06-15 00:00 |
08:24:29.21 |
+12:42:43.9 |
HIP 41247 |
29.29 |
| 2026-06-15 12:00 |
08:24:43.94 |
+12:42:32.7 |
HIP 41247 |
28.52 |
| 2026-06-16 00:00 |
08:24:58.74 |
+12:42:21.0 |
HIP 41400 |
25.84 |
| 2026-06-16 12:00 |
08:25:13.60 |
+12:42:08.9 |
HIP 41400 |
22.22 |
| 2026-06-17 00:00 |
08:25:28.53 |
+12:41:56.2 |
HIP 41400 |
18.59 |
| 2026-06-17 12:00 |
08:25:43.51 |
+12:41:43.1 |
HIP 41400 |
14.94 |
| 2026-06-18 00:00 |
08:25:58.56 |
+12:41:29.4 |
HIP 41400 |
11.29 |
| 2026-06-18 12:00 |
08:26:13.67 |
+12:41:15.3 |
HIP 41400 |
7.64 |
| 2026-06-19 00:00 |
08:26:28.84 |
+12:41:00.7 |
HIP 41400 |
4.07 |
| 2026-06-19 12:00 |
08:26:44.08 |
+12:40:45.6 |
HIP 41400 |
1.47 |
| 2026-06-20 00:00 |
08:26:59.37 |
+12:40:30.1 |
HIP 41400 |
3.95 |
| 2026-06-20 12:00 |
08:27:14.71 |
+12:40:14.1 |
HIP 41400 |
7.56 |
| 2026-06-21 00:00 |
08:27:30.12 |
+12:39:57.6 |
HIP 41474 |
6.73 |
| 2026-06-21 12:00 |
08:27:45.58 |
+12:39:40.6 |
HIP 41474 |
7.60 |
| 2026-06-22 00:00 |
08:28:01.10 |
+12:39:23.2 |
HIP 41474 |
9.96 |