메타데이터
| 항목 |
값 |
| Designation |
302P/Lemmon-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-03-08T21:40:03.639360Z |
| Orbit solution date (soln_date, UTC) |
2026-04-14T13:42:34Z |
| Obs used |
993 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
16.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-08-18.0000000 |
| e |
0.23011984 |
| q (au) |
3.288834 |
| a (au) |
4.271878 |
| i (deg) |
6.033733 |
| Ω (om, deg) |
121.724408 |
| ω (w, deg) |
208.543535 |
| M (ma, deg) |
296.494117 |
밝기
산란 + 전체 선형
$$
M_a = (6.485 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.485 |
| n |
6.000 |
| gf |
0.906 |
| gb |
-0.910 |
| k |
1.000 |
| δ90 |
3.370 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2023-03-27 |
2024-12-03 |
+19.3492 |
-9.991 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
02:50:35.38 |
+11:27:15.2 |
HIP 13228 |
10.50 |
| 2026-05-12 12:00 |
02:51:12.05 |
+11:30:00.4 |
HIP 13366 |
13.73 |
| 2026-05-13 00:00 |
02:51:48.71 |
+11:32:44.9 |
HIP 13366 |
10.75 |
| 2026-05-13 12:00 |
02:52:25.35 |
+11:35:28.7 |
HIP 13366 |
14.78 |
| 2026-05-14 00:00 |
02:53:01.99 |
+11:38:11.9 |
HIP 13366 |
22.30 |
| 2026-05-14 12:00 |
02:53:38.61 |
+11:40:54.4 |
HIP 13461 |
19.96 |
| 2026-05-15 00:00 |
02:54:15.23 |
+11:43:36.3 |
HIP 13586 |
18.08 |
| 2026-05-15 12:00 |
02:54:51.83 |
+11:46:17.5 |
HIP 13586 |
16.96 |
| 2026-05-16 00:00 |
02:55:28.41 |
+11:48:58.0 |
HIP 13586 |
20.57 |
| 2026-05-16 12:00 |
02:56:04.98 |
+11:51:37.9 |
HIP 13586 |
27.06 |
| 2026-05-17 00:00 |
02:56:41.54 |
+11:54:17.1 |
HIP 13669 |
30.50 |
| 2026-05-17 12:00 |
02:57:18.08 |
+11:56:55.6 |
HIP 13921 |
30.09 |
| 2026-05-18 00:00 |
02:57:54.60 |
+11:59:33.4 |
HIP 13921 |
20.99 |
| 2026-05-18 12:00 |
02:58:31.11 |
+12:02:10.6 |
HIP 13921 |
12.22 |
| 2026-05-19 00:00 |
02:59:07.60 |
+12:04:47.0 |
HIP 13921 |
5.58 |
| 2026-05-19 12:00 |
02:59:44.07 |
+12:07:22.8 |
HIP 13966 |
8.84 |
| 2026-05-20 00:00 |
03:00:20.52 |
+12:09:57.9 |
HIP 13966 |
13.48 |
| 2026-05-20 12:00 |
03:00:56.95 |
+12:12:32.3 |
HIP 13966 |
21.38 |
| 2026-05-21 00:00 |
03:01:33.36 |
+12:15:06.0 |
HIP 14175 |
18.88 |
| 2026-05-21 12:00 |
03:02:09.75 |
+12:17:39.0 |
HIP 14175 |
9.65 |
| 2026-05-22 00:00 |
03:02:46.12 |
+12:20:11.3 |
HIP 14175 |
1.05 |
| 2026-05-22 12:00 |
03:03:22.47 |
+12:22:42.9 |
HIP 14175 |
8.92 |
| 2026-05-23 00:00 |
03:03:58.79 |
+12:25:13.8 |
HIP 14175 |
18.11 |
| 2026-05-23 12:00 |
03:04:35.09 |
+12:27:44.0 |
HIP 14343 |
13.11 |
| 2026-05-24 00:00 |
03:05:11.37 |
+12:30:13.4 |
HIP 14343 |
9.94 |
| 2026-05-24 12:00 |
03:05:47.62 |
+12:32:42.2 |
HIP 14343 |
13.97 |
| 2026-05-25 00:00 |
03:06:23.85 |
+12:35:10.3 |
HIP 14343 |
21.44 |
| 2026-05-25 12:00 |
03:07:00.06 |
+12:37:37.6 |
HIP 14606 |
28.26 |
| 2026-05-26 00:00 |
03:07:36.23 |
+12:40:04.3 |
HIP 14606 |
23.06 |
| 2026-05-26 12:00 |
03:08:12.38 |
+12:42:30.2 |
HIP 14631 |
14.92 |
| 2026-05-27 00:00 |
03:08:48.51 |
+12:44:55.4 |
HIP 14631 |
7.31 |
| 2026-05-27 12:00 |
03:09:24.61 |
+12:47:19.9 |
HIP 14631 |
7.16 |
| 2026-05-28 00:00 |
03:10:00.67 |
+12:49:43.7 |
HIP 14711 |
10.14 |
| 2026-05-28 12:00 |
03:10:36.72 |
+12:52:06.8 |
HIP 14711 |
11.06 |
| 2026-05-29 00:00 |
03:11:12.73 |
+12:54:29.1 |
HIP 14821 |
8.68 |
| 2026-05-29 12:00 |
03:11:48.71 |
+12:56:50.8 |
HIP 14821 |
8.88 |
| 2026-05-30 00:00 |
03:12:24.67 |
+12:59:11.7 |
HIP 14821 |
15.72 |
| 2026-05-30 12:00 |
03:13:00.59 |
+13:01:31.8 |
HIP 15081 |
21.32 |
| 2026-05-31 00:00 |
03:13:36.49 |
+13:03:51.3 |
HIP 15081 |
12.39 |
| 2026-05-31 12:00 |
03:14:12.35 |
+13:06:10.0 |
HIP 15081 |
4.03 |
| 2026-06-01 00:00 |
03:14:48.18 |
+13:08:28.0 |
HIP 15113 |
1.72 |
| 2026-06-01 12:00 |
03:15:23.98 |
+13:10:45.3 |
HIP 15113 |
7.34 |
| 2026-06-02 00:00 |
03:15:59.75 |
+13:13:01.8 |
HIP 15113 |
16.33 |