메타데이터
| 항목 |
값 |
| Designation |
C/2024 J4 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-04-26T00:22:33.818880Z |
| Orbit solution date (soln_date, UTC) |
2026-05-05T09:12:14Z |
| Obs used |
768 |
| NEO |
- |
| M1 |
11.500 |
| K1 |
5.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2024-05-11T09:58:56.611200Z |
| Discovery magnitude (MPC) |
20.17 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-05-01.0000000 |
| e |
0.99909832 |
| q (au) |
5.695136 |
| a (au) |
6316.124816 |
| i (deg) |
117.530997 |
| Ω (om, deg) |
19.304570 |
| ω (w, deg) |
127.858902 |
| M (ma, deg) |
0.000010 |
밝기
산란 + 전체 선형
$$
M_a = (3.107 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
3.107 |
| n |
6.000 |
| gf |
0.974 |
| gb |
-0.998 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
13:45:59.98 |
+06:24:36.7 |
HIP 67246 |
14.71 |
| 2026-05-12 12:00 |
13:45:32.60 |
+06:23:44.5 |
HIP 67246 |
21.25 |
| 2026-05-13 00:00 |
13:45:05.34 |
+06:22:51.3 |
HIP 67038 |
22.56 |
| 2026-05-13 12:00 |
13:44:38.21 |
+06:21:56.9 |
HIP 66989 |
16.89 |
| 2026-05-14 00:00 |
13:44:11.21 |
+06:21:01.4 |
HIP 66989 |
11.39 |
| 2026-05-14 12:00 |
13:43:44.33 |
+06:20:04.8 |
HIP 66989 |
8.10 |
| 2026-05-15 00:00 |
13:43:17.59 |
+06:19:07.1 |
HIP 66989 |
9.59 |
| 2026-05-15 12:00 |
13:42:50.98 |
+06:18:08.4 |
HIP 66989 |
14.40 |
| 2026-05-16 00:00 |
13:42:24.51 |
+06:17:08.5 |
HIP 66989 |
20.26 |
| 2026-05-16 12:00 |
13:41:58.17 |
+06:16:07.6 |
HIP 66989 |
26.46 |
| 2026-05-17 00:00 |
13:41:31.97 |
+06:15:05.6 |
HIP 66719 |
22.69 |
| 2026-05-17 12:00 |
13:41:05.91 |
+06:14:02.5 |
HIP 66719 |
20.32 |
| 2026-05-18 00:00 |
13:40:40.00 |
+06:12:58.3 |
HIP 66719 |
19.94 |
| 2026-05-18 12:00 |
13:40:14.23 |
+06:11:53.1 |
HIP 66662 |
18.07 |
| 2026-05-19 00:00 |
13:39:48.60 |
+06:10:46.8 |
HIP 66662 |
16.72 |
| 2026-05-19 12:00 |
13:39:23.13 |
+06:09:39.4 |
HIP 66662 |
17.74 |
| 2026-05-20 00:00 |
13:38:57.81 |
+06:08:31.0 |
HIP 66662 |
20.77 |
| 2026-05-20 12:00 |
13:38:32.63 |
+06:07:21.5 |
HIP 66662 |
25.05 |
| 2026-05-21 00:00 |
13:38:07.61 |
+06:06:11.0 |
HIP 66662 |
30.04 |
| 2026-05-21 12:00 |
13:37:42.75 |
+06:04:59.4 |
HIP 66662 |
35.42 |
| 2026-05-22 00:00 |
13:37:18.04 |
+06:03:46.8 |
HIP 66586 |
38.96 |
| 2026-05-22 12:00 |
13:36:53.49 |
+06:02:33.1 |
HIP 66297 |
37.21 |
| 2026-05-23 00:00 |
13:36:29.10 |
+06:01:18.5 |
HIP 66270 |
34.56 |
| 2026-05-23 12:00 |
13:36:04.87 |
+06:00:02.8 |
HIP 66270 |
31.95 |
| 2026-05-24 00:00 |
13:35:40.80 |
+05:58:46.1 |
HIP 66270 |
30.42 |
| 2026-05-24 12:00 |
13:35:16.89 |
+05:57:28.4 |
HIP 66227 |
26.09 |
| 2026-05-25 00:00 |
13:34:53.15 |
+05:56:09.6 |
HIP 66227 |
22.43 |
| 2026-05-25 12:00 |
13:34:29.57 |
+05:54:49.9 |
HIP 66227 |
19.95 |
| 2026-05-26 00:00 |
13:34:06.16 |
+05:53:29.2 |
HIP 66113 |
14.36 |
| 2026-05-26 12:00 |
13:33:42.91 |
+05:52:07.6 |
HIP 66113 |
8.44 |
| 2026-05-27 00:00 |
13:33:19.84 |
+05:50:44.9 |
HIP 66113 |
2.69 |
| 2026-05-27 12:00 |
13:32:56.93 |
+05:49:21.3 |
HIP 66113 |
3.55 |
| 2026-05-28 00:00 |
13:32:34.19 |
+05:47:56.7 |
HIP 66113 |
9.28 |
| 2026-05-28 12:00 |
13:32:11.63 |
+05:46:31.2 |
HIP 66113 |
15.05 |
| 2026-05-29 00:00 |
13:31:49.24 |
+05:45:04.7 |
HIP 66113 |
20.80 |
| 2026-05-29 12:00 |
13:31:27.02 |
+05:43:37.2 |
HIP 66113 |
26.51 |
| 2026-05-30 00:00 |
13:31:04.97 |
+05:42:08.9 |
HIP 65855 |
25.07 |
| 2026-05-30 12:00 |
13:30:43.10 |
+05:40:39.6 |
HIP 65855 |
23.10 |
| 2026-05-31 00:00 |
13:30:21.40 |
+05:39:09.4 |
HIP 65855 |
22.44 |
| 2026-05-31 12:00 |
13:29:59.88 |
+05:37:38.2 |
HIP 65855 |
23.17 |
| 2026-06-01 00:00 |
13:29:38.54 |
+05:36:06.2 |
HIP 65855 |
25.15 |
| 2026-06-01 12:00 |
13:29:17.37 |
+05:34:33.2 |
HIP 65855 |
28.10 |
| 2026-06-02 00:00 |
13:28:56.39 |
+05:32:59.4 |
HIP 65717 |
27.85 |