메타데이터
| 항목 |
값 |
| Designation |
457P/Lemmon-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-05-04T06:45:39.692160Z |
| Orbit solution date (soln_date, UTC) |
2025-01-02T20:13:03Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
36.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2016-07-03T13:38:06.950400Z |
| Discovery magnitude (MPC) |
23.20 T |
| Discovery observatory (MPC) |
T09 · Subaru Telescope, Maunakea |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-04-13.0000000 |
| e |
0.11977371 |
| q (au) |
2.329381 |
| a (au) |
2.646344 |
| i (deg) |
5.222268 |
| Ω (om, deg) |
176.012536 |
| ω (w, deg) |
104.953942 |
| M (ma, deg) |
355.127619 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.721 |
| k |
0.978 |
| 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) |
| 2026-03-26 00:00 |
03:09:28.91 |
+13:36:32.9 |
HIP 14694 |
10.89 |
| 2026-03-26 12:00 |
03:10:11.07 |
+13:39:34.4 |
HIP 14694 |
8.16 |
| 2026-03-27 00:00 |
03:10:53.32 |
+13:42:35.4 |
HIP 14694 |
15.60 |
| 2026-03-27 12:00 |
03:11:35.65 |
+13:45:36.0 |
HIP 14897 |
19.32 |
| 2026-03-28 00:00 |
03:12:18.07 |
+13:48:36.2 |
HIP 14897 |
13.79 |
| 2026-03-28 12:00 |
03:13:00.56 |
+13:51:35.9 |
HIP 14897 |
15.40 |
| 2026-03-29 00:00 |
03:13:43.14 |
+13:54:35.1 |
HIP 14897 |
22.71 |
| 2026-03-29 12:00 |
03:14:25.80 |
+13:57:34.0 |
HIP 15153 |
24.29 |
| 2026-03-30 00:00 |
03:15:08.55 |
+14:00:32.3 |
HIP 15153 |
17.82 |
| 2026-03-30 12:00 |
03:15:51.37 |
+14:03:30.2 |
HIP 15233 |
14.92 |
| 2026-03-31 00:00 |
03:16:34.27 |
+14:06:27.6 |
HIP 15233 |
15.52 |
| 2026-03-31 12:00 |
03:17:17.25 |
+14:09:24.5 |
HIP 15345 |
20.44 |
| 2026-04-01 00:00 |
03:18:00.30 |
+14:12:20.9 |
HIP 15345 |
21.60 |
| 2026-04-01 12:00 |
03:18:43.44 |
+14:15:16.9 |
HIP 15558 |
25.30 |
| 2026-04-02 00:00 |
03:19:26.65 |
+14:18:12.3 |
HIP 15558 |
16.32 |
| 2026-04-02 12:00 |
03:20:09.94 |
+14:21:07.3 |
HIP 15558 |
11.33 |
| 2026-04-03 00:00 |
03:20:53.30 |
+14:24:01.7 |
HIP 15558 |
15.08 |
| 2026-04-03 12:00 |
03:21:36.74 |
+14:26:55.6 |
HIP 15558 |
23.76 |
| 2026-04-04 00:00 |
03:22:20.26 |
+14:29:49.0 |
HIP 15558 |
33.77 |
| 2026-04-04 12:00 |
03:23:03.85 |
+14:32:41.8 |
HIP 15894 |
35.44 |
| 2026-04-05 00:00 |
03:23:47.51 |
+14:35:34.1 |
HIP 15894 |
26.71 |
| 2026-04-05 12:00 |
03:24:31.25 |
+14:38:25.9 |
HIP 15894 |
20.26 |
| 2026-04-06 00:00 |
03:25:15.06 |
+14:41:17.1 |
HIP 15894 |
18.66 |
| 2026-04-06 12:00 |
03:25:58.95 |
+14:44:07.8 |
HIP 15894 |
22.95 |
| 2026-04-07 00:00 |
03:26:42.90 |
+14:46:57.9 |
HIP 16007 |
30.68 |
| 2026-04-07 12:00 |
03:27:26.93 |
+14:49:47.5 |
HIP 16221 |
24.28 |
| 2026-04-08 00:00 |
03:28:11.03 |
+14:52:36.4 |
HIP 16221 |
13.54 |
| 2026-04-08 12:00 |
03:28:55.20 |
+14:55:24.8 |
HIP 16221 |
4.47 |
| 2026-04-09 00:00 |
03:29:39.44 |
+14:58:12.6 |
HIP 16221 |
10.02 |
| 2026-04-09 12:00 |
03:30:23.75 |
+15:00:59.8 |
HIP 16246 |
19.71 |
| 2026-04-10 00:00 |
03:31:08.13 |
+15:03:46.5 |
HIP 16246 |
27.52 |
| 2026-04-10 12:00 |
03:31:52.58 |
+15:06:32.5 |
HIP 16571 |
22.03 |
| 2026-04-11 00:00 |
03:32:37.10 |
+15:09:17.9 |
HIP 16571 |
10.94 |
| 2026-04-11 12:00 |
03:33:21.68 |
+15:12:02.7 |
HIP 16571 |
0.21 |
| 2026-04-12 00:00 |
03:34:06.33 |
+15:14:46.8 |
HIP 16571 |
11.28 |
| 2026-04-12 12:00 |
03:34:51.05 |
+15:17:30.4 |
HIP 16571 |
22.40 |
| 2026-04-13 00:00 |
03:35:35.84 |
+15:20:13.3 |
HIP 16891 |
29.15 |
| 2026-04-13 12:00 |
03:36:20.69 |
+15:22:55.6 |
HIP 16924 |
21.20 |
| 2026-04-14 00:00 |
03:37:05.61 |
+15:25:37.2 |
HIP 16924 |
10.17 |
| 2026-04-14 12:00 |
03:37:50.59 |
+15:28:18.2 |
HIP 16924 |
2.55 |
| 2026-04-15 00:00 |
03:38:35.64 |
+15:30:58.5 |
HIP 16924 |
12.61 |
| 2026-04-15 12:00 |
03:39:20.75 |
+15:33:38.1 |
HIP 16924 |
23.71 |
| 2026-04-16 00:00 |
03:40:05.92 |
+15:36:17.1 |
HIP 16924 |
34.87 |