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 |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
14:52:25.84 |
-10:40:13.7 |
HIP 72668 |
15.91 |
| 2026-05-12 12:00 |
14:52:09.78 |
-10:39:17.5 |
HIP 72668 |
12.01 |
| 2026-05-13 00:00 |
14:51:53.75 |
-10:38:21.8 |
HIP 72668 |
8.27 |
| 2026-05-13 12:00 |
14:51:37.77 |
-10:37:26.5 |
HIP 72668 |
5.04 |
| 2026-05-14 00:00 |
14:51:21.82 |
-10:36:31.7 |
HIP 72668 |
3.88 |
| 2026-05-14 12:00 |
14:51:05.93 |
-10:35:37.3 |
HIP 72668 |
6.08 |
| 2026-05-15 00:00 |
14:50:50.08 |
-10:34:43.4 |
HIP 72668 |
9.53 |
| 2026-05-15 12:00 |
14:50:34.28 |
-10:33:49.9 |
HIP 72668 |
13.28 |
| 2026-05-16 00:00 |
14:50:18.53 |
-10:32:57.0 |
HIP 72668 |
17.12 |
| 2026-05-16 12:00 |
14:50:02.84 |
-10:32:04.6 |
HIP 72668 |
21.00 |
| 2026-05-17 00:00 |
14:49:47.20 |
-10:31:12.7 |
HIP 72478 |
20.47 |
| 2026-05-17 12:00 |
14:49:31.63 |
-10:30:21.4 |
HIP 72478 |
19.94 |
| 2026-05-18 00:00 |
14:49:16.12 |
-10:29:30.5 |
HIP 72478 |
20.17 |
| 2026-05-18 12:00 |
14:49:00.68 |
-10:28:40.3 |
HIP 72478 |
21.11 |
| 2026-05-19 00:00 |
14:48:45.30 |
-10:27:50.5 |
HIP 72478 |
22.68 |
| 2026-05-19 12:00 |
14:48:30.00 |
-10:27:01.4 |
HIP 72478 |
24.74 |
| 2026-05-20 00:00 |
14:48:14.76 |
-10:26:12.8 |
HIP 72478 |
27.18 |
| 2026-05-20 12:00 |
14:47:59.61 |
-10:25:24.9 |
HIP 72239 |
23.86 |
| 2026-05-21 00:00 |
14:47:44.53 |
-10:24:37.5 |
HIP 72239 |
20.41 |
| 2026-05-21 12:00 |
14:47:29.53 |
-10:23:50.7 |
HIP 72239 |
17.13 |
| 2026-05-22 00:00 |
14:47:14.61 |
-10:23:04.5 |
HIP 72239 |
14.10 |
| 2026-05-22 12:00 |
14:46:59.78 |
-10:22:19.0 |
HIP 72239 |
11.51 |
| 2026-05-23 00:00 |
14:46:45.04 |
-10:21:34.1 |
HIP 72239 |
9.70 |
| 2026-05-23 12:00 |
14:46:30.38 |
-10:20:49.8 |
HIP 72239 |
9.10 |
| 2026-05-24 00:00 |
14:46:15.81 |
-10:20:06.1 |
HIP 72239 |
9.92 |
| 2026-05-24 12:00 |
14:46:01.34 |
-10:19:23.2 |
HIP 72239 |
11.84 |
| 2026-05-25 00:00 |
14:45:46.96 |
-10:18:40.8 |
HIP 72239 |
14.41 |
| 2026-05-25 12:00 |
14:45:32.68 |
-10:17:59.2 |
HIP 72239 |
17.32 |
| 2026-05-26 00:00 |
14:45:18.50 |
-10:17:18.2 |
HIP 72239 |
20.43 |
| 2026-05-26 12:00 |
14:45:04.42 |
-10:16:37.8 |
HIP 72239 |
23.63 |
| 2026-05-27 00:00 |
14:44:50.44 |
-10:15:58.2 |
HIP 72239 |
26.89 |
| 2026-05-27 12:00 |
14:44:36.57 |
-10:15:19.3 |
HIP 71982 |
27.58 |
| 2026-05-28 00:00 |
14:44:22.80 |
-10:14:41.0 |
HIP 71982 |
25.88 |
| 2026-05-28 12:00 |
14:44:09.14 |
-10:14:03.5 |
HIP 71982 |
24.54 |
| 2026-05-29 00:00 |
14:43:55.59 |
-10:13:26.7 |
HIP 71982 |
23.62 |
| 2026-05-29 12:00 |
14:43:42.15 |
-10:12:50.5 |
HIP 71982 |
23.17 |
| 2026-05-30 00:00 |
14:43:28.82 |
-10:12:15.2 |
HIP 71982 |
23.19 |
| 2026-05-30 12:00 |
14:43:15.61 |
-10:11:40.5 |
HIP 71982 |
23.66 |
| 2026-05-31 00:00 |
14:43:02.51 |
-10:11:06.6 |
HIP 71982 |
24.56 |
| 2026-05-31 12:00 |
14:42:49.54 |
-10:10:33.4 |
HIP 71982 |
25.82 |
| 2026-06-01 00:00 |
14:42:36.68 |
-10:10:00.9 |
HIP 71834 |
25.40 |
| 2026-06-01 12:00 |
14:42:23.94 |
-10:09:29.2 |
HIP 71834 |
23.39 |
| 2026-06-02 00:00 |
14:42:11.33 |
-10:08:58.3 |
HIP 71834 |
21.69 |