메타데이터
| 항목 |
값 |
| Designation |
P/2020 K9 (Lemmon-PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-02-11T15:05:58.525440Z |
| Orbit solution date (soln_date, UTC) |
2021-05-31T22:43:04Z |
| Obs used |
133 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-05-22T10:22:34.176000Z |
| Discovery magnitude (MPC) |
20.50 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-08-21.0000000 |
| e |
0.32212437 |
| q (au) |
2.849537 |
| a (au) |
4.203629 |
| i (deg) |
23.202607 |
| Ω (om, deg) |
166.242195 |
| ω (w, deg) |
196.834702 |
| M (ma, deg) |
340.029714 |
밝기
산란 + 전체 선형
$$
M_a = (14.360 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.360 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.500 |
| k |
1.000 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
13:25:33.94 |
+07:24:31.3 |
HIP 65558 |
13.05 |
| 2026-07-29 12:00 |
13:25:45.94 |
+07:22:35.6 |
HIP 65558 |
10.17 |
| 2026-07-30 00:00 |
13:25:58.07 |
+07:20:39.4 |
HIP 65558 |
7.81 |
| 2026-07-30 12:00 |
13:26:10.33 |
+07:18:42.7 |
HIP 65558 |
6.64 |
| 2026-07-31 00:00 |
13:26:22.72 |
+07:16:45.5 |
HIP 65558 |
7.30 |
| 2026-07-31 12:00 |
13:26:35.24 |
+07:14:47.9 |
HIP 65558 |
9.45 |
| 2026-08-01 00:00 |
13:26:47.88 |
+07:12:49.8 |
HIP 65558 |
12.36 |
| 2026-08-01 12:00 |
13:27:00.66 |
+07:10:51.2 |
HIP 65558 |
15.63 |
| 2026-08-02 00:00 |
13:27:13.56 |
+07:08:52.2 |
HIP 65558 |
19.10 |
| 2026-08-02 12:00 |
13:27:26.59 |
+07:06:52.7 |
HIP 65558 |
22.69 |
| 2026-08-03 00:00 |
13:27:39.75 |
+07:04:52.8 |
HIP 65736 |
25.77 |
| 2026-08-03 12:00 |
13:27:53.03 |
+07:02:52.4 |
HIP 65736 |
22.53 |
| 2026-08-04 00:00 |
13:28:06.44 |
+07:00:51.6 |
HIP 65736 |
19.51 |
| 2026-08-04 12:00 |
13:28:19.97 |
+06:58:50.4 |
HIP 65736 |
16.83 |
| 2026-08-05 00:00 |
13:28:33.62 |
+06:56:48.8 |
HIP 65736 |
14.72 |
| 2026-08-05 12:00 |
13:28:47.40 |
+06:54:46.7 |
HIP 65736 |
13.47 |
| 2026-08-06 00:00 |
13:29:01.30 |
+06:52:44.3 |
HIP 65736 |
13.35 |
| 2026-08-06 12:00 |
13:29:15.32 |
+06:50:41.4 |
HIP 65736 |
14.41 |
| 2026-08-07 00:00 |
13:29:29.47 |
+06:48:38.2 |
HIP 65736 |
16.45 |
| 2026-08-07 12:00 |
13:29:43.73 |
+06:46:34.6 |
HIP 65736 |
19.18 |
| 2026-08-08 00:00 |
13:29:58.12 |
+06:44:30.6 |
HIP 65736 |
22.35 |
| 2026-08-08 12:00 |
13:30:12.62 |
+06:42:26.2 |
HIP 65736 |
25.83 |
| 2026-08-09 00:00 |
13:30:27.25 |
+06:40:21.5 |
HIP 65736 |
29.52 |
| 2026-08-09 12:00 |
13:30:41.99 |
+06:38:16.4 |
HIP 66033 |
29.24 |
| 2026-08-10 00:00 |
13:30:56.85 |
+06:36:10.9 |
HIP 66033 |
25.02 |
| 2026-08-10 12:00 |
13:31:11.83 |
+06:34:05.2 |
HIP 66033 |
20.80 |
| 2026-08-11 00:00 |
13:31:26.93 |
+06:31:59.0 |
HIP 66033 |
16.56 |
| 2026-08-11 12:00 |
13:31:42.14 |
+06:29:52.6 |
HIP 66033 |
12.35 |
| 2026-08-12 00:00 |
13:31:57.47 |
+06:27:45.9 |
HIP 66033 |
8.24 |
| 2026-08-12 12:00 |
13:32:12.91 |
+06:25:38.8 |
HIP 66033 |
4.59 |
| 2026-08-13 00:00 |
13:32:28.47 |
+06:23:31.4 |
HIP 66033 |
3.57 |
| 2026-08-13 12:00 |
13:32:44.14 |
+06:21:23.8 |
HIP 66033 |
6.61 |
| 2026-08-14 00:00 |
13:32:59.92 |
+06:19:15.8 |
HIP 66033 |
10.71 |
| 2026-08-14 12:00 |
13:33:15.82 |
+06:17:07.6 |
HIP 66033 |
15.04 |
| 2026-08-15 00:00 |
13:33:31.83 |
+06:14:59.1 |
HIP 66033 |
19.48 |
| 2026-08-15 12:00 |
13:33:47.94 |
+06:12:50.3 |
HIP 66270 |
22.29 |
| 2026-08-16 00:00 |
13:34:04.17 |
+06:10:41.3 |
HIP 66270 |
21.01 |
| 2026-08-16 12:00 |
13:34:20.51 |
+06:08:32.0 |
HIP 66270 |
20.67 |
| 2026-08-17 00:00 |
13:34:36.95 |
+06:06:22.5 |
HIP 66270 |
21.34 |
| 2026-08-17 12:00 |
13:34:53.50 |
+06:04:12.7 |
HIP 66270 |
22.95 |
| 2026-08-18 00:00 |
13:35:10.16 |
+06:02:02.8 |
HIP 66270 |
25.32 |
| 2026-08-18 12:00 |
13:35:26.92 |
+05:59:52.6 |
HIP 66270 |
28.28 |
| 2026-08-19 00:00 |
13:35:43.79 |
+05:57:42.2 |
HIP 66227 |
30.19 |