메타데이터
| 항목 |
값 |
| Designation |
P/2018 C1 (Lemmon-Read) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-02-25T13:35:25.753920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:40Z |
| Obs used |
121 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-03-01.0000000 |
| e |
0.53445831 |
| q (au) |
2.595759 |
| a (au) |
5.575781 |
| i (deg) |
5.133510 |
| Ω (om, deg) |
270.449437 |
| ω (w, deg) |
234.329129 |
| M (ma, deg) |
0.257046 |
밝기
산란 + 전체 선형
$$
M_a = (11.162 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.162 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.882 |
| k |
1.000 |
| δ90 |
9.994 |
| 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) |
| 2026-05-12 00:00 |
23:05:00.50 |
-00:54:04.9 |
HIP 113909 |
17.72 |
| 2026-05-12 12:00 |
23:05:08.73 |
-00:52:56.3 |
HIP 113909 |
20.06 |
| 2026-05-13 00:00 |
23:05:16.87 |
-00:51:48.2 |
HIP 113909 |
22.38 |
| 2026-05-13 12:00 |
23:05:24.93 |
-00:50:40.5 |
HIP 113909 |
24.68 |
| 2026-05-14 00:00 |
23:05:32.91 |
-00:49:33.2 |
HIP 113909 |
26.96 |
| 2026-05-14 12:00 |
23:05:40.81 |
-00:48:26.3 |
HIP 113909 |
29.22 |
| 2026-05-15 00:00 |
23:05:48.62 |
-00:47:19.9 |
HIP 113909 |
31.46 |
| 2026-05-15 12:00 |
23:05:56.35 |
-00:46:13.9 |
HIP 113909 |
33.68 |
| 2026-05-16 00:00 |
23:06:03.99 |
-00:45:08.4 |
HIP 114098 |
34.13 |
| 2026-05-16 12:00 |
23:06:11.55 |
-00:44:03.3 |
HIP 114098 |
32.72 |
| 2026-05-17 00:00 |
23:06:19.02 |
-00:42:58.6 |
HIP 114098 |
31.40 |
| 2026-05-17 12:00 |
23:06:26.41 |
-00:41:54.5 |
HIP 114098 |
30.18 |
| 2026-05-18 00:00 |
23:06:33.71 |
-00:40:50.7 |
HIP 114098 |
29.08 |
| 2026-05-18 12:00 |
23:06:40.92 |
-00:39:47.5 |
HIP 114211 |
27.34 |
| 2026-05-19 00:00 |
23:06:48.05 |
-00:38:44.7 |
HIP 114211 |
25.45 |
| 2026-05-19 12:00 |
23:06:55.08 |
-00:37:42.4 |
HIP 114211 |
23.62 |
| 2026-05-20 00:00 |
23:07:02.03 |
-00:36:40.5 |
HIP 114211 |
21.83 |
| 2026-05-20 12:00 |
23:07:08.89 |
-00:35:39.1 |
HIP 114260 |
20.11 |
| 2026-05-21 00:00 |
23:07:15.66 |
-00:34:38.3 |
HIP 114260 |
18.20 |
| 2026-05-21 12:00 |
23:07:22.34 |
-00:33:37.9 |
HIP 114260 |
16.34 |
| 2026-05-22 00:00 |
23:07:28.93 |
-00:32:37.9 |
HIP 114260 |
14.52 |
| 2026-05-22 12:00 |
23:07:35.43 |
-00:31:38.5 |
HIP 114260 |
12.76 |
| 2026-05-23 00:00 |
23:07:41.84 |
-00:30:39.6 |
HIP 114260 |
11.07 |
| 2026-05-23 12:00 |
23:07:48.16 |
-00:29:41.2 |
HIP 114260 |
9.48 |
| 2026-05-24 00:00 |
23:07:54.38 |
-00:28:43.2 |
HIP 114260 |
8.01 |
| 2026-05-24 12:00 |
23:08:00.52 |
-00:27:45.8 |
HIP 114260 |
6.75 |
| 2026-05-25 00:00 |
23:08:06.56 |
-00:26:48.9 |
HIP 114260 |
5.81 |
| 2026-05-25 12:00 |
23:08:12.51 |
-00:25:52.5 |
HIP 114260 |
5.31 |
| 2026-05-26 00:00 |
23:08:18.37 |
-00:24:56.6 |
HIP 114260 |
5.38 |
| 2026-05-26 12:00 |
23:08:24.13 |
-00:24:01.2 |
HIP 114260 |
5.97 |
| 2026-05-27 00:00 |
23:08:29.80 |
-00:23:06.4 |
HIP 114260 |
6.93 |
| 2026-05-27 12:00 |
23:08:35.38 |
-00:22:12.0 |
HIP 114260 |
8.11 |
| 2026-05-28 00:00 |
23:08:40.86 |
-00:21:18.2 |
HIP 114260 |
9.43 |
| 2026-05-28 12:00 |
23:08:46.25 |
-00:20:24.9 |
HIP 114260 |
10.81 |
| 2026-05-29 00:00 |
23:08:51.54 |
-00:19:32.2 |
HIP 114260 |
12.23 |
| 2026-05-29 12:00 |
23:08:56.73 |
-00:18:40.0 |
HIP 114260 |
13.66 |
| 2026-05-30 00:00 |
23:09:01.84 |
-00:17:48.3 |
HIP 114260 |
15.10 |
| 2026-05-30 12:00 |
23:09:06.84 |
-00:16:57.1 |
HIP 114260 |
16.54 |
| 2026-05-31 00:00 |
23:09:11.75 |
-00:16:06.6 |
HIP 114260 |
17.96 |
| 2026-05-31 12:00 |
23:09:16.56 |
-00:15:16.5 |
HIP 114260 |
19.38 |
| 2026-06-01 00:00 |
23:09:21.27 |
-00:14:27.0 |
HIP 114260 |
20.77 |
| 2026-06-01 12:00 |
23:09:25.89 |
-00:13:38.1 |
HIP 114260 |
22.15 |
| 2026-06-02 00:00 |
23:09:30.41 |
-00:12:49.7 |
HIP 114260 |
23.51 |