메타데이터
| 항목 |
값 |
| Designation |
423P/Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-09-24T00:20:08.096640Z |
| Orbit solution date (soln_date, UTC) |
2023-03-28T19:43:45Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-02-19.0000000 |
| e |
0.12005480 |
| q (au) |
5.418519 |
| a (au) |
6.157791 |
| i (deg) |
8.348898 |
| Ω (om, deg) |
33.347491 |
| ω (w, deg) |
80.712810 |
| M (ma, deg) |
322.394999 |
밝기
산란 + 전체 선형
$$
M_a = (12.108 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.108 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.778 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
15:08:45.04 |
-21:40:40.0 |
HIP 74142 |
4.83 |
| 2026-07-29 12:00 |
15:08:47.61 |
-21:40:46.6 |
HIP 74142 |
4.29 |
| 2026-07-30 00:00 |
15:08:50.33 |
-21:40:53.7 |
HIP 74142 |
3.74 |
| 2026-07-30 12:00 |
15:08:53.21 |
-21:41:01.4 |
HIP 74142 |
3.20 |
| 2026-07-31 00:00 |
15:08:56.23 |
-21:41:09.6 |
HIP 74142 |
2.70 |
| 2026-07-31 12:00 |
15:08:59.41 |
-21:41:18.4 |
HIP 74142 |
2.29 |
| 2026-08-01 00:00 |
15:09:02.73 |
-21:41:27.8 |
HIP 74142 |
2.07 |
| 2026-08-01 12:00 |
15:09:06.21 |
-21:41:37.7 |
HIP 74142 |
2.15 |
| 2026-08-02 00:00 |
15:09:09.83 |
-21:41:48.2 |
HIP 74142 |
2.54 |
| 2026-08-02 12:00 |
15:09:13.61 |
-21:41:59.2 |
HIP 74143 |
3.10 |
| 2026-08-03 00:00 |
15:09:17.53 |
-21:42:10.8 |
HIP 74143 |
3.79 |
| 2026-08-03 12:00 |
15:09:21.60 |
-21:42:22.9 |
HIP 74143 |
4.60 |
| 2026-08-04 00:00 |
15:09:25.82 |
-21:42:35.6 |
HIP 74143 |
5.49 |
| 2026-08-04 12:00 |
15:09:30.19 |
-21:42:48.9 |
HIP 74143 |
6.45 |
| 2026-08-05 00:00 |
15:09:34.71 |
-21:43:02.7 |
HIP 74143 |
7.46 |
| 2026-08-05 12:00 |
15:09:39.37 |
-21:43:17.0 |
HIP 74143 |
8.52 |
| 2026-08-06 00:00 |
15:09:44.19 |
-21:43:31.9 |
HIP 74143 |
9.62 |
| 2026-08-06 12:00 |
15:09:49.15 |
-21:43:47.4 |
HIP 74143 |
10.77 |
| 2026-08-07 00:00 |
15:09:54.25 |
-21:44:03.4 |
HIP 74143 |
11.96 |
| 2026-08-07 12:00 |
15:09:59.51 |
-21:44:19.9 |
HIP 74143 |
13.19 |
| 2026-08-08 00:00 |
15:10:04.91 |
-21:44:37.1 |
HIP 74143 |
14.45 |
| 2026-08-08 12:00 |
15:10:10.45 |
-21:44:54.7 |
HIP 74143 |
15.76 |
| 2026-08-09 00:00 |
15:10:16.15 |
-21:45:12.9 |
HIP 74143 |
17.10 |
| 2026-08-09 12:00 |
15:10:21.98 |
-21:45:31.7 |
HIP 74143 |
18.48 |
| 2026-08-10 00:00 |
15:10:27.97 |
-21:45:51.0 |
HIP 74143 |
19.89 |
| 2026-08-10 12:00 |
15:10:34.09 |
-21:46:10.9 |
HIP 74291 |
19.80 |
| 2026-08-11 00:00 |
15:10:40.37 |
-21:46:31.3 |
HIP 74291 |
19.00 |
| 2026-08-11 12:00 |
15:10:46.78 |
-21:46:52.2 |
HIP 74291 |
18.27 |
| 2026-08-12 00:00 |
15:10:53.34 |
-21:47:13.7 |
HIP 74291 |
17.63 |
| 2026-08-12 12:00 |
15:11:00.05 |
-21:47:35.7 |
HIP 74291 |
17.10 |
| 2026-08-13 00:00 |
15:11:06.89 |
-21:47:58.3 |
HIP 74291 |
16.69 |
| 2026-08-13 12:00 |
15:11:13.88 |
-21:48:21.4 |
HIP 74291 |
16.43 |
| 2026-08-14 00:00 |
15:11:21.01 |
-21:48:45.1 |
HIP 74291 |
16.34 |
| 2026-08-14 12:00 |
15:11:28.28 |
-21:49:09.2 |
HIP 74291 |
16.43 |
| 2026-08-15 00:00 |
15:11:35.69 |
-21:49:33.9 |
HIP 74291 |
16.70 |
| 2026-08-15 12:00 |
15:11:43.25 |
-21:49:59.2 |
HIP 74291 |
17.16 |
| 2026-08-16 00:00 |
15:11:50.94 |
-21:50:24.9 |
HIP 74291 |
17.80 |
| 2026-08-16 12:00 |
15:11:58.77 |
-21:50:51.2 |
HIP 74477 |
17.48 |
| 2026-08-17 00:00 |
15:12:06.74 |
-21:51:18.0 |
HIP 74477 |
15.63 |
| 2026-08-17 12:00 |
15:12:14.85 |
-21:51:45.4 |
HIP 74477 |
13.77 |
| 2026-08-18 00:00 |
15:12:23.09 |
-21:52:13.2 |
HIP 74477 |
11.89 |
| 2026-08-18 12:00 |
15:12:31.47 |
-21:52:41.6 |
HIP 74477 |
10.02 |
| 2026-08-19 00:00 |
15:12:39.99 |
-21:53:10.4 |
HIP 74477 |
8.18 |