메타데이터
| 항목 |
값 |
| Designation |
C/2020 W5 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-11-30T01:54:40.083840Z |
| Orbit solution date (soln_date, UTC) |
2025-01-10T09:12:15Z |
| Obs used |
55 |
| NEO |
- |
| M1 |
14.200 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-11-20T05:24:13.046400Z |
| Discovery magnitude (MPC) |
21.61 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-11-30.0000000 |
| e |
1.00164978 |
| q (au) |
3.364485 |
| a (au) |
-2039.359232 |
| i (deg) |
88.594700 |
| Ω (om, deg) |
75.516670 |
| ω (w, deg) |
24.475527 |
| M (ma, deg) |
-0.000001 |
밝기
산란 + 전체 선형
$$
M_a = (16.215 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.215 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.960 |
| 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 |
17:09:33.83 |
+11:45:09.6 |
HIP 84050 |
22.72 |
| 2026-06-01 12:00 |
17:09:25.33 |
+11:45:05.4 |
HIP 84050 |
24.62 |
| 2026-06-02 00:00 |
17:09:16.83 |
+11:45:00.6 |
HIP 84050 |
26.55 |
| 2026-06-02 12:00 |
17:09:08.32 |
+11:44:55.2 |
HIP 83784 |
25.99 |
| 2026-06-03 00:00 |
17:08:59.81 |
+11:44:49.1 |
HIP 83784 |
24.02 |
| 2026-06-03 12:00 |
17:08:51.28 |
+11:44:42.5 |
HIP 83784 |
22.06 |
| 2026-06-04 00:00 |
17:08:42.76 |
+11:44:35.3 |
HIP 83784 |
20.13 |
| 2026-06-04 12:00 |
17:08:34.23 |
+11:44:27.5 |
HIP 83784 |
18.24 |
| 2026-06-05 00:00 |
17:08:25.70 |
+11:44:19.1 |
HIP 83784 |
16.41 |
| 2026-06-05 12:00 |
17:08:17.17 |
+11:44:10.1 |
HIP 83784 |
14.65 |
| 2026-06-06 00:00 |
17:08:08.63 |
+11:44:00.5 |
HIP 83784 |
12.99 |
| 2026-06-06 12:00 |
17:08:00.10 |
+11:43:50.2 |
HIP 83784 |
11.48 |
| 2026-06-07 00:00 |
17:07:51.56 |
+11:43:39.4 |
HIP 83784 |
10.19 |
| 2026-06-07 12:00 |
17:07:43.03 |
+11:43:28.0 |
HIP 83784 |
9.21 |
| 2026-06-08 00:00 |
17:07:34.49 |
+11:43:16.0 |
HIP 83784 |
8.65 |
| 2026-06-08 12:00 |
17:07:25.96 |
+11:43:03.3 |
HIP 83784 |
8.59 |
| 2026-06-09 00:00 |
17:07:17.43 |
+11:42:50.1 |
HIP 83784 |
9.04 |
| 2026-06-09 12:00 |
17:07:08.91 |
+11:42:36.2 |
HIP 83784 |
9.94 |
| 2026-06-10 00:00 |
17:07:00.39 |
+11:42:21.8 |
HIP 83784 |
11.16 |
| 2026-06-10 12:00 |
17:06:51.87 |
+11:42:06.7 |
HIP 83784 |
12.63 |
| 2026-06-11 00:00 |
17:06:43.36 |
+11:41:51.0 |
HIP 83784 |
14.26 |
| 2026-06-11 12:00 |
17:06:34.86 |
+11:41:34.7 |
HIP 83784 |
16.01 |
| 2026-06-12 00:00 |
17:06:26.36 |
+11:41:17.8 |
HIP 83784 |
17.84 |
| 2026-06-12 12:00 |
17:06:17.87 |
+11:41:00.3 |
HIP 83784 |
19.72 |
| 2026-06-13 00:00 |
17:06:09.39 |
+11:40:42.2 |
HIP 83784 |
21.65 |
| 2026-06-13 12:00 |
17:06:00.92 |
+11:40:23.5 |
HIP 83784 |
23.61 |
| 2026-06-14 00:00 |
17:05:52.46 |
+11:40:04.2 |
HIP 83596 |
24.45 |
| 2026-06-14 12:00 |
17:05:44.02 |
+11:39:44.3 |
HIP 83596 |
23.31 |
| 2026-06-15 00:00 |
17:05:35.58 |
+11:39:23.7 |
HIP 83596 |
22.29 |
| 2026-06-15 12:00 |
17:05:27.15 |
+11:39:02.6 |
HIP 83596 |
21.42 |
| 2026-06-16 00:00 |
17:05:18.74 |
+11:38:40.9 |
HIP 83596 |
20.72 |
| 2026-06-16 12:00 |
17:05:10.34 |
+11:38:18.5 |
HIP 83596 |
20.21 |
| 2026-06-17 00:00 |
17:05:01.96 |
+11:37:55.5 |
HIP 83596 |
19.88 |
| 2026-06-17 12:00 |
17:04:53.59 |
+11:37:32.0 |
HIP 83526 |
19.53 |
| 2026-06-18 00:00 |
17:04:45.24 |
+11:37:07.8 |
HIP 83526 |
18.22 |
| 2026-06-18 12:00 |
17:04:36.91 |
+11:36:43.1 |
HIP 83526 |
17.05 |
| 2026-06-19 00:00 |
17:04:28.59 |
+11:36:17.7 |
HIP 83526 |
16.05 |
| 2026-06-19 12:00 |
17:04:20.29 |
+11:35:51.8 |
HIP 83526 |
15.27 |
| 2026-06-20 00:00 |
17:04:12.02 |
+11:35:25.2 |
HIP 83526 |
14.73 |
| 2026-06-20 12:00 |
17:04:03.76 |
+11:34:58.1 |
HIP 83526 |
14.47 |
| 2026-06-21 00:00 |
17:03:55.52 |
+11:34:30.3 |
HIP 83526 |
14.48 |
| 2026-06-21 12:00 |
17:03:47.30 |
+11:34:02.0 |
HIP 83526 |
14.78 |
| 2026-06-22 00:00 |
17:03:39.10 |
+11:33:33.1 |
HIP 83526 |
15.34 |