메타데이터
| 항목 |
값 |
| Designation |
349P/Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-08-26T12:49:38.985600Z |
| Orbit solution date (soln_date, UTC) |
2024-06-14T15:42:23Z |
| Obs used |
209 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
17.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-08-10.0000000 |
| e |
0.29990139 |
| q (au) |
2.499745 |
| a (au) |
3.570561 |
| i (deg) |
5.492271 |
| Ω (om, deg) |
331.761163 |
| ω (w, deg) |
255.998978 |
| M (ma, deg) |
104.225129 |
밝기
산란 + 전체 선형
$$
M_a = (15.373 + 3.703\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.373 |
| n |
3.703 |
| gf |
0.996 |
| gb |
-0.646 |
| k |
0.914 |
| δ90 |
9.995 |
| 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 |
00:32:57.10 |
+06:01:10.1 |
HIP 2688 |
18.08 |
| 2026-05-12 12:00 |
00:33:23.09 |
+06:04:20.5 |
HIP 2688 |
13.17 |
| 2026-05-13 00:00 |
00:33:49.00 |
+06:07:30.4 |
HIP 2688 |
11.12 |
| 2026-05-13 12:00 |
00:34:14.84 |
+06:10:39.9 |
HIP 2688 |
13.30 |
| 2026-05-14 00:00 |
00:34:40.59 |
+06:13:48.8 |
HIP 2688 |
18.21 |
| 2026-05-14 12:00 |
00:35:06.26 |
+06:16:57.3 |
HIP 2831 |
12.87 |
| 2026-05-15 00:00 |
00:35:31.84 |
+06:20:05.3 |
HIP 2831 |
5.83 |
| 2026-05-15 12:00 |
00:35:57.34 |
+06:23:12.8 |
HIP 2831 |
1.64 |
| 2026-05-16 00:00 |
00:36:22.76 |
+06:26:19.7 |
HIP 2831 |
8.42 |
| 2026-05-16 12:00 |
00:36:48.09 |
+06:29:26.2 |
HIP 2831 |
15.41 |
| 2026-05-17 00:00 |
00:37:13.34 |
+06:32:32.1 |
HIP 2831 |
22.39 |
| 2026-05-17 12:00 |
00:37:38.50 |
+06:35:37.5 |
HIP 2831 |
29.36 |
| 2026-05-18 00:00 |
00:38:03.57 |
+06:38:42.3 |
HIP 2831 |
36.30 |
| 2026-05-18 12:00 |
00:38:28.55 |
+06:41:46.7 |
HIP 3033 |
40.49 |
| 2026-05-19 00:00 |
00:38:53.45 |
+06:44:50.5 |
HIP 3033 |
43.78 |
| 2026-05-19 12:00 |
00:39:18.25 |
+06:47:53.7 |
HIP 3033 |
47.83 |
| 2026-05-20 00:00 |
00:39:42.96 |
+06:50:56.4 |
HIP 3382 |
48.61 |
| 2026-05-20 12:00 |
00:40:07.58 |
+06:53:58.6 |
HIP 3382 |
42.77 |
| 2026-05-21 00:00 |
00:40:32.11 |
+06:57:00.2 |
HIP 3382 |
37.29 |
| 2026-05-21 12:00 |
00:40:56.55 |
+07:00:01.2 |
HIP 3382 |
32.33 |
| 2026-05-22 00:00 |
00:41:20.89 |
+07:03:01.7 |
HIP 3382 |
28.16 |
| 2026-05-22 12:00 |
00:41:45.14 |
+07:06:01.6 |
HIP 3382 |
25.15 |
| 2026-05-23 00:00 |
00:42:09.29 |
+07:09:01.0 |
HIP 3382 |
23.72 |
| 2026-05-23 12:00 |
00:42:33.35 |
+07:11:59.8 |
HIP 3382 |
24.13 |
| 2026-05-24 00:00 |
00:42:57.31 |
+07:14:58.0 |
HIP 3382 |
26.27 |
| 2026-05-24 12:00 |
00:43:21.17 |
+07:17:55.6 |
HIP 3382 |
29.76 |
| 2026-05-25 00:00 |
00:43:44.94 |
+07:20:52.6 |
HIP 3466 |
26.80 |
| 2026-05-25 12:00 |
00:44:08.61 |
+07:23:49.1 |
HIP 3466 |
22.61 |
| 2026-05-26 00:00 |
00:44:32.18 |
+07:26:45.0 |
HIP 3466 |
19.75 |
| 2026-05-26 12:00 |
00:44:55.65 |
+07:29:40.2 |
HIP 3466 |
18.82 |
| 2026-05-27 00:00 |
00:45:19.02 |
+07:32:34.9 |
HIP 3574 |
18.87 |
| 2026-05-27 12:00 |
00:45:42.29 |
+07:35:29.0 |
HIP 3574 |
15.22 |
| 2026-05-28 00:00 |
00:46:05.45 |
+07:38:22.5 |
HIP 3574 |
13.80 |
| 2026-05-28 12:00 |
00:46:28.52 |
+07:41:15.4 |
HIP 3574 |
15.22 |
| 2026-05-29 00:00 |
00:46:51.48 |
+07:44:07.7 |
HIP 3574 |
18.80 |
| 2026-05-29 12:00 |
00:47:14.34 |
+07:46:59.3 |
HIP 3574 |
23.57 |
| 2026-05-30 00:00 |
00:47:37.10 |
+07:49:50.4 |
HIP 3786 |
21.60 |
| 2026-05-30 12:00 |
00:47:59.75 |
+07:52:40.8 |
HIP 3786 |
20.31 |
| 2026-05-31 00:00 |
00:48:22.29 |
+07:55:30.6 |
HIP 3862 |
18.03 |
| 2026-05-31 12:00 |
00:48:44.73 |
+07:58:19.8 |
HIP 3862 |
12.43 |
| 2026-06-01 00:00 |
00:49:07.06 |
+08:01:08.3 |
HIP 3862 |
7.87 |
| 2026-06-01 12:00 |
00:49:29.28 |
+08:03:56.3 |
HIP 3862 |
6.79 |
| 2026-06-02 00:00 |
00:49:51.40 |
+08:06:43.5 |
HIP 3862 |
10.30 |