메타데이터
| 항목 |
값 |
| Designation |
449P/Leonard |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-11-23T14:34:44.742720Z |
| Orbit solution date (soln_date, UTC) |
2024-02-25T22:13:10Z |
| Obs used |
294 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
37.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
1987-03-23T09:59:28.320000Z |
| Discovery magnitude (MPC) |
17.50 T |
| Discovery observatory (MPC) |
260 · Siding Spring Observatory-DSS |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-10-20.0000000 |
| e |
0.47899106 |
| q (au) |
1.874781 |
| a (au) |
3.598367 |
| i (deg) |
15.459226 |
| Ω (om, deg) |
242.570978 |
| ω (w, deg) |
176.651702 |
| M (ma, deg) |
355.002928 |
밝기
산란 + 전체 선형
$$
M_a = (14.886 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.886 |
| n |
6.000 |
| gf |
0.994 |
| gb |
-0.800 |
| k |
0.993 |
| 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) |
| 2026-06-01 00:00 |
20:23:15.68 |
-04:15:29.9 |
HIP 100535 |
26.85 |
| 2026-06-01 12:00 |
20:23:11.21 |
-04:13:12.2 |
HIP 100535 |
24.50 |
| 2026-06-02 00:00 |
20:23:06.48 |
-04:10:55.4 |
HIP 100535 |
22.22 |
| 2026-06-02 12:00 |
20:23:01.49 |
-04:08:39.4 |
HIP 100535 |
20.02 |
| 2026-06-03 00:00 |
20:22:56.24 |
-04:06:24.3 |
HIP 100535 |
17.95 |
| 2026-06-03 12:00 |
20:22:50.72 |
-04:04:10.1 |
HIP 100535 |
16.07 |
| 2026-06-04 00:00 |
20:22:44.95 |
-04:01:56.7 |
HIP 100535 |
14.46 |
| 2026-06-04 12:00 |
20:22:38.91 |
-03:59:44.3 |
HIP 100535 |
13.25 |
| 2026-06-05 00:00 |
20:22:32.61 |
-03:57:32.8 |
HIP 100535 |
12.55 |
| 2026-06-05 12:00 |
20:22:26.04 |
-03:55:22.3 |
HIP 100535 |
12.47 |
| 2026-06-06 00:00 |
20:22:19.22 |
-03:53:12.7 |
HIP 100535 |
13.05 |
| 2026-06-06 12:00 |
20:22:12.13 |
-03:51:04.1 |
HIP 100454 |
12.98 |
| 2026-06-07 00:00 |
20:22:04.78 |
-03:48:56.4 |
HIP 100454 |
11.07 |
| 2026-06-07 12:00 |
20:21:57.16 |
-03:46:49.8 |
HIP 100454 |
9.65 |
| 2026-06-08 00:00 |
20:21:49.28 |
-03:44:44.2 |
HIP 100454 |
9.00 |
| 2026-06-08 12:00 |
20:21:41.14 |
-03:42:39.6 |
HIP 100454 |
9.31 |
| 2026-06-09 00:00 |
20:21:32.73 |
-03:40:36.0 |
HIP 100454 |
10.51 |
| 2026-06-09 12:00 |
20:21:24.07 |
-03:38:33.5 |
HIP 100454 |
12.38 |
| 2026-06-10 00:00 |
20:21:15.14 |
-03:36:32.1 |
HIP 100454 |
14.68 |
| 2026-06-10 12:00 |
20:21:05.94 |
-03:34:31.8 |
HIP 100454 |
17.26 |
| 2026-06-11 00:00 |
20:20:56.49 |
-03:32:32.6 |
HIP 100454 |
20.04 |
| 2026-06-11 12:00 |
20:20:46.77 |
-03:30:34.5 |
HIP 100454 |
22.94 |
| 2026-06-12 00:00 |
20:20:36.79 |
-03:28:37.5 |
HIP 100428 |
24.94 |
| 2026-06-12 12:00 |
20:20:26.55 |
-03:26:41.7 |
HIP 100188 |
24.98 |
| 2026-06-13 00:00 |
20:20:16.05 |
-03:24:47.1 |
HIP 100188 |
24.86 |
| 2026-06-13 12:00 |
20:20:05.30 |
-03:22:53.6 |
HIP 100188 |
25.11 |
| 2026-06-14 00:00 |
20:19:54.28 |
-03:21:01.3 |
HIP 100188 |
25.73 |
| 2026-06-14 12:00 |
20:19:43.00 |
-03:19:10.3 |
HIP 100188 |
26.73 |
| 2026-06-15 00:00 |
20:19:31.47 |
-03:17:20.4 |
HIP 100188 |
28.07 |
| 2026-06-15 12:00 |
20:19:19.68 |
-03:15:31.8 |
HIP 100188 |
29.72 |
| 2026-06-16 00:00 |
20:19:07.64 |
-03:13:44.5 |
HIP 100188 |
31.65 |
| 2026-06-16 12:00 |
20:18:55.34 |
-03:11:58.4 |
HIP 100188 |
33.82 |
| 2026-06-17 00:00 |
20:18:42.79 |
-03:10:13.6 |
HIP 99956 |
34.05 |
| 2026-06-17 12:00 |
20:18:29.99 |
-03:08:30.1 |
HIP 99956 |
32.56 |
| 2026-06-18 00:00 |
20:18:16.95 |
-03:06:47.9 |
HIP 99956 |
31.35 |
| 2026-06-18 12:00 |
20:18:03.65 |
-03:05:07.0 |
HIP 99956 |
30.48 |
| 2026-06-19 00:00 |
20:17:50.11 |
-03:03:27.5 |
HIP 99956 |
30.01 |
| 2026-06-19 12:00 |
20:17:36.32 |
-03:01:49.2 |
HIP 99956 |
29.96 |
| 2026-06-20 00:00 |
20:17:22.29 |
-03:00:12.4 |
HIP 99956 |
30.35 |
| 2026-06-20 12:00 |
20:17:08.01 |
-02:58:36.9 |
HIP 99835 |
30.27 |
| 2026-06-21 00:00 |
20:16:53.50 |
-02:57:02.7 |
HIP 99835 |
26.34 |
| 2026-06-21 12:00 |
20:16:38.75 |
-02:55:30.0 |
HIP 99835 |
22.39 |
| 2026-06-22 00:00 |
20:16:23.76 |
-02:53:58.6 |
HIP 99835 |
18.41 |