메타데이터
| 항목 |
값 |
| Designation |
C/2024 G5 (Leonard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-09-06T23:37:33.974400Z |
| Orbit solution date (soln_date, UTC) |
2024-05-07T20:12:02Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
14.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-04-05T03:09:00.950400Z |
| Discovery magnitude (MPC) |
20.83 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-03-23.0000000 |
| e |
0.99442966 |
| q (au) |
2.952917 |
| a (au) |
530.114505 |
| i (deg) |
50.390198 |
| Ω (om, deg) |
316.398824 |
| ω (w, deg) |
209.557081 |
| M (ma, deg) |
359.986435 |
밝기
산란 + 전체 선형
$$
M_a = (9.344 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.344 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
17:55:51.29 |
-60:09:38.3 |
HIP 87709 |
9.09 |
| 2026-09-20 12:00 |
17:56:01.99 |
-60:06:25.3 |
HIP 87709 |
12.34 |
| 2026-09-21 00:00 |
17:56:12.91 |
-60:03:12.9 |
HIP 87845 |
9.41 |
| 2026-09-21 12:00 |
17:56:24.04 |
-60:00:00.9 |
HIP 87845 |
5.94 |
| 2026-09-22 00:00 |
17:56:35.39 |
-59:56:49.3 |
HIP 87845 |
2.48 |
| 2026-09-22 12:00 |
17:56:46.96 |
-59:53:38.3 |
HIP 87845 |
1.19 |
| 2026-09-23 00:00 |
17:56:58.73 |
-59:50:27.7 |
HIP 87845 |
4.60 |
| 2026-09-23 12:00 |
17:57:10.71 |
-59:47:17.6 |
HIP 87845 |
8.10 |
| 2026-09-24 00:00 |
17:57:22.90 |
-59:44:08.0 |
HIP 87953 |
5.42 |
| 2026-09-24 12:00 |
17:57:35.29 |
-59:40:58.9 |
HIP 87953 |
3.61 |
| 2026-09-25 00:00 |
17:57:47.89 |
-59:37:50.3 |
HIP 87963 |
3.84 |
| 2026-09-25 12:00 |
17:58:00.68 |
-59:34:42.2 |
HIP 87963 |
0.76 |
| 2026-09-26 00:00 |
17:58:13.68 |
-59:31:34.6 |
HIP 87963 |
3.37 |
| 2026-09-26 12:00 |
17:58:26.87 |
-59:28:27.5 |
HIP 87963 |
6.86 |
| 2026-09-27 00:00 |
17:58:40.25 |
-59:25:20.9 |
HIP 87963 |
10.39 |
| 2026-09-27 12:00 |
17:58:53.83 |
-59:22:14.8 |
HIP 87963 |
13.93 |
| 2026-09-28 00:00 |
17:59:07.61 |
-59:19:09.3 |
HIP 87963 |
17.48 |
| 2026-09-28 12:00 |
17:59:21.57 |
-59:16:04.2 |
HIP 87963 |
21.03 |
| 2026-09-29 00:00 |
17:59:35.72 |
-59:12:59.7 |
HIP 87979 |
20.96 |
| 2026-09-29 12:00 |
17:59:50.06 |
-59:09:55.7 |
HIP 87979 |
19.39 |
| 2026-09-30 00:00 |
18:00:04.58 |
-59:06:52.3 |
HIP 87979 |
18.42 |
| 2026-09-30 12:00 |
18:00:19.29 |
-59:03:49.4 |
HIP 88162 |
18.15 |
| 2026-10-01 00:00 |
18:00:34.18 |
-59:00:47.0 |
HIP 88162 |
15.19 |
| 2026-10-01 12:00 |
18:00:49.25 |
-58:57:45.2 |
HIP 88162 |
12.58 |
| 2026-10-02 00:00 |
18:01:04.50 |
-58:54:43.8 |
HIP 88162 |
10.60 |
| 2026-10-02 12:00 |
18:01:19.92 |
-58:51:43.1 |
HIP 88162 |
9.65 |
| 2026-10-03 00:00 |
18:01:35.53 |
-58:48:42.9 |
HIP 88162 |
10.02 |
| 2026-10-03 12:00 |
18:01:51.30 |
-58:45:43.2 |
HIP 88162 |
11.60 |
| 2026-10-04 00:00 |
18:02:07.25 |
-58:42:44.1 |
HIP 88162 |
13.99 |
| 2026-10-04 12:00 |
18:02:23.38 |
-58:39:45.5 |
HIP 88220 |
16.57 |
| 2026-10-05 00:00 |
18:02:39.67 |
-58:36:47.5 |
HIP 88360 |
14.49 |
| 2026-10-05 12:00 |
18:02:56.13 |
-58:33:50.1 |
HIP 88360 |
11.80 |
| 2026-10-06 00:00 |
18:03:12.76 |
-58:30:53.2 |
HIP 88360 |
9.79 |
| 2026-10-06 12:00 |
18:03:29.56 |
-58:27:56.9 |
HIP 88360 |
8.92 |
| 2026-10-07 00:00 |
18:03:46.52 |
-58:25:01.2 |
HIP 88456 |
6.96 |
| 2026-10-07 12:00 |
18:04:03.64 |
-58:22:06.0 |
HIP 88456 |
5.27 |
| 2026-10-08 00:00 |
18:04:20.92 |
-58:19:11.4 |
HIP 88456 |
5.88 |
| 2026-10-08 12:00 |
18:04:38.37 |
-58:16:17.3 |
HIP 88456 |
8.30 |
| 2026-10-09 00:00 |
18:04:55.97 |
-58:13:23.9 |
HIP 88456 |
11.45 |
| 2026-10-09 12:00 |
18:05:13.73 |
-58:10:31.0 |
HIP 88456 |
14.87 |
| 2026-10-10 00:00 |
18:05:31.64 |
-58:07:38.7 |
HIP 88456 |
18.42 |
| 2026-10-10 12:00 |
18:05:49.71 |
-58:04:47.0 |
HIP 88456 |
22.04 |
| 2026-10-11 00:00 |
18:06:07.93 |
-58:01:55.9 |
HIP 88456 |
25.70 |