메타데이터
| 항목 |
값 |
| Designation |
481P/Lemmon-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-01-20T09:40:11.303040Z |
| Orbit solution date (soln_date, UTC) |
2025-01-02T20:13:07Z |
| Obs used |
58 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
8.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-12T23:21:45.216000Z |
| Discovery magnitude (MPC) |
20.20 G |
| Discovery observatory (MPC) |
J04 · ESA Optical Ground Station, Tenerife |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-02-02.0000000 |
| e |
0.33653656 |
| q (au) |
3.174489 |
| a (au) |
4.784723 |
| i (deg) |
6.121394 |
| Ω (om, deg) |
94.508201 |
| ω (w, deg) |
352.744493 |
| M (ma, deg) |
173.143194 |
밝기
산란 + 전체 선형
$$
M_a = (10.456 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.456 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.536 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
14:58:05.66 |
-13:13:19.1 |
HIP 73291 |
28.67 |
| 2026-09-20 12:00 |
14:58:24.34 |
-13:15:00.7 |
HIP 73291 |
29.25 |
| 2026-09-21 00:00 |
14:58:43.10 |
-13:16:42.4 |
HIP 73196 |
30.60 |
| 2026-09-21 12:00 |
14:59:01.95 |
-13:18:24.3 |
HIP 73196 |
32.05 |
| 2026-09-22 00:00 |
14:59:20.87 |
-13:20:06.2 |
HIP 73516 |
32.23 |
| 2026-09-22 12:00 |
14:59:39.88 |
-13:21:48.2 |
HIP 73516 |
27.66 |
| 2026-09-23 00:00 |
14:59:58.97 |
-13:23:30.3 |
HIP 73516 |
23.23 |
| 2026-09-23 12:00 |
15:00:18.14 |
-13:25:12.5 |
HIP 73516 |
19.04 |
| 2026-09-24 00:00 |
15:00:37.38 |
-13:26:54.8 |
HIP 73516 |
15.29 |
| 2026-09-24 12:00 |
15:00:56.71 |
-13:28:37.1 |
HIP 73516 |
12.44 |
| 2026-09-25 00:00 |
15:01:16.11 |
-13:30:19.5 |
HIP 73516 |
11.20 |
| 2026-09-25 12:00 |
15:01:35.59 |
-13:32:02.0 |
HIP 73516 |
12.11 |
| 2026-09-26 00:00 |
15:01:55.15 |
-13:33:44.6 |
HIP 73516 |
14.79 |
| 2026-09-26 12:00 |
15:02:14.78 |
-13:35:27.2 |
HIP 73516 |
18.50 |
| 2026-09-27 00:00 |
15:02:34.49 |
-13:37:09.9 |
HIP 73516 |
22.75 |
| 2026-09-27 12:00 |
15:02:54.27 |
-13:38:52.6 |
HIP 73516 |
27.31 |
| 2026-09-28 00:00 |
15:03:14.12 |
-13:40:35.4 |
HIP 73516 |
32.04 |
| 2026-09-28 12:00 |
15:03:34.05 |
-13:42:18.2 |
HIP 73847 |
31.15 |
| 2026-09-29 00:00 |
15:03:54.05 |
-13:44:01.1 |
HIP 73847 |
27.57 |
| 2026-09-29 12:00 |
15:04:14.13 |
-13:45:44.0 |
HIP 73847 |
24.54 |
| 2026-09-30 00:00 |
15:04:34.28 |
-13:47:26.9 |
HIP 73847 |
22.31 |
| 2026-09-30 12:00 |
15:04:54.49 |
-13:49:09.9 |
HIP 73847 |
21.13 |
| 2026-10-01 00:00 |
15:05:14.78 |
-13:50:52.9 |
HIP 73847 |
21.20 |
| 2026-10-01 12:00 |
15:05:35.14 |
-13:52:36.0 |
HIP 73847 |
22.52 |
| 2026-10-02 00:00 |
15:05:55.57 |
-13:54:19.0 |
HIP 73880 |
21.13 |
| 2026-10-02 12:00 |
15:06:16.06 |
-13:56:02.1 |
HIP 73880 |
19.67 |
| 2026-10-03 00:00 |
15:06:36.63 |
-13:57:45.2 |
HIP 73880 |
19.56 |
| 2026-10-03 12:00 |
15:06:57.26 |
-13:59:28.2 |
HIP 73880 |
20.85 |
| 2026-10-04 00:00 |
15:07:17.96 |
-14:01:11.3 |
HIP 73880 |
23.31 |
| 2026-10-04 12:00 |
15:07:38.73 |
-14:02:54.4 |
HIP 74145 |
20.51 |
| 2026-10-05 00:00 |
15:07:59.56 |
-14:04:37.5 |
HIP 74145 |
15.94 |
| 2026-10-05 12:00 |
15:08:20.46 |
-14:06:20.6 |
HIP 74145 |
12.00 |
| 2026-10-06 00:00 |
15:08:41.42 |
-14:08:03.7 |
HIP 74145 |
9.55 |
| 2026-10-06 12:00 |
15:09:02.45 |
-14:09:46.7 |
HIP 74145 |
9.80 |
| 2026-10-07 00:00 |
15:09:23.54 |
-14:11:29.7 |
HIP 74145 |
12.60 |
| 2026-10-07 12:00 |
15:09:44.70 |
-14:13:12.7 |
HIP 74145 |
16.74 |
| 2026-10-08 00:00 |
15:10:05.91 |
-14:14:55.7 |
HIP 74145 |
21.46 |
| 2026-10-08 12:00 |
15:10:27.19 |
-14:16:38.7 |
HIP 74145 |
26.46 |
| 2026-10-09 00:00 |
15:10:48.53 |
-14:18:21.6 |
HIP 74145 |
31.61 |
| 2026-10-09 12:00 |
15:11:09.93 |
-14:20:04.4 |
HIP 74431 |
30.99 |
| 2026-10-10 00:00 |
15:11:31.39 |
-14:21:47.2 |
HIP 74431 |
26.18 |
| 2026-10-10 12:00 |
15:11:52.90 |
-14:23:30.0 |
HIP 74431 |
21.67 |
| 2026-10-11 00:00 |
15:12:14.48 |
-14:25:12.7 |
HIP 74431 |
17.71 |