메타데이터
| 항목 |
값 |
| Designation |
505P/Palomar |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-09-27T12:23:29.313600Z |
| Orbit solution date (soln_date, UTC) |
2026-07-16T19:12:30Z |
| Obs used |
87 |
| NEO |
- |
| M1 |
16.600 |
| K1 |
5.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2009-05-27T04:54:45.216000Z |
| Discovery magnitude (MPC) |
19.60 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-02-22.0000000 |
| e |
0.31748876 |
| q (au) |
2.788124 |
| a (au) |
4.085096 |
| i (deg) |
11.469932 |
| Ω (om, deg) |
112.302344 |
| ω (w, deg) |
144.665083 |
| M (ma, deg) |
246.774171 |
밝기
산란 + 전체 선형
$$
M_a = (10.961 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.961 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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) |
| 2026-09-20 00:00 |
19:41:53.73 |
-25:42:40.8 |
HIP 96971 |
10.21 |
| 2026-09-20 12:00 |
19:42:03.88 |
-25:42:58.5 |
HIP 96971 |
8.04 |
| 2026-09-21 00:00 |
19:42:14.35 |
-25:43:15.1 |
HIP 96971 |
5.88 |
| 2026-09-21 12:00 |
19:42:25.12 |
-25:43:30.5 |
HIP 96971 |
3.91 |
| 2026-09-22 00:00 |
19:42:36.21 |
-25:43:44.7 |
HIP 96971 |
2.79 |
| 2026-09-22 12:00 |
19:42:47.60 |
-25:43:57.7 |
HIP 96971 |
3.61 |
| 2026-09-23 00:00 |
19:42:59.30 |
-25:44:09.5 |
HIP 96971 |
5.66 |
| 2026-09-23 12:00 |
19:43:11.31 |
-25:44:20.1 |
HIP 96971 |
8.12 |
| 2026-09-24 00:00 |
19:43:23.61 |
-25:44:29.6 |
HIP 96971 |
10.75 |
| 2026-09-24 12:00 |
19:43:36.22 |
-25:44:37.8 |
HIP 96971 |
13.51 |
| 2026-09-25 00:00 |
19:43:49.13 |
-25:44:45.0 |
HIP 96971 |
16.35 |
| 2026-09-25 12:00 |
19:44:02.34 |
-25:44:50.9 |
HIP 96971 |
19.28 |
| 2026-09-26 00:00 |
19:44:15.84 |
-25:44:55.7 |
HIP 96971 |
22.28 |
| 2026-09-26 12:00 |
19:44:29.64 |
-25:44:59.4 |
HIP 97186 |
24.30 |
| 2026-09-27 00:00 |
19:44:43.73 |
-25:45:01.9 |
HIP 97186 |
23.30 |
| 2026-09-27 12:00 |
19:44:58.11 |
-25:45:03.3 |
HIP 97186 |
22.68 |
| 2026-09-28 00:00 |
19:45:12.78 |
-25:45:03.5 |
HIP 97186 |
22.49 |
| 2026-09-28 12:00 |
19:45:27.74 |
-25:45:02.6 |
HIP 97186 |
22.78 |
| 2026-09-29 00:00 |
19:45:42.99 |
-25:45:00.6 |
HIP 97186 |
23.55 |
| 2026-09-29 12:00 |
19:45:58.52 |
-25:44:57.4 |
HIP 97390 |
23.94 |
| 2026-09-30 00:00 |
19:46:14.33 |
-25:44:53.1 |
HIP 97390 |
20.55 |
| 2026-09-30 12:00 |
19:46:30.42 |
-25:44:47.7 |
HIP 97390 |
17.17 |
| 2026-10-01 00:00 |
19:46:46.79 |
-25:44:41.2 |
HIP 97390 |
13.86 |
| 2026-10-01 12:00 |
19:47:03.45 |
-25:44:33.6 |
HIP 97390 |
10.73 |
| 2026-10-02 00:00 |
19:47:20.37 |
-25:44:24.8 |
HIP 97390 |
8.09 |
| 2026-10-02 12:00 |
19:47:37.58 |
-25:44:15.0 |
HIP 97390 |
6.68 |
| 2026-10-03 00:00 |
19:47:55.05 |
-25:44:04.0 |
HIP 97390 |
7.36 |
| 2026-10-03 12:00 |
19:48:12.80 |
-25:43:51.9 |
HIP 97390 |
9.77 |
| 2026-10-04 00:00 |
19:48:30.82 |
-25:43:38.8 |
HIP 97390 |
13.03 |
| 2026-10-04 12:00 |
19:48:49.10 |
-25:43:24.5 |
HIP 97390 |
16.71 |
| 2026-10-05 00:00 |
19:49:07.66 |
-25:43:09.2 |
HIP 97390 |
20.61 |
| 2026-10-05 12:00 |
19:49:26.48 |
-25:42:52.7 |
HIP 97390 |
24.65 |
| 2026-10-06 00:00 |
19:49:45.56 |
-25:42:35.2 |
HIP 97637 |
27.16 |
| 2026-10-06 12:00 |
19:50:04.91 |
-25:42:16.5 |
HIP 97637 |
25.20 |
| 2026-10-07 00:00 |
19:50:24.52 |
-25:41:56.8 |
HIP 97637 |
23.87 |
| 2026-10-07 12:00 |
19:50:44.39 |
-25:41:36.0 |
HIP 97637 |
23.30 |
| 2026-10-08 00:00 |
19:51:04.51 |
-25:41:14.1 |
HIP 97637 |
23.59 |
| 2026-10-08 12:00 |
19:51:24.90 |
-25:40:51.1 |
HIP 97637 |
24.74 |
| 2026-10-09 00:00 |
19:51:45.53 |
-25:40:27.0 |
HIP 97851 |
22.61 |
| 2026-10-09 12:00 |
19:52:06.42 |
-25:40:01.9 |
HIP 97851 |
18.63 |
| 2026-10-10 00:00 |
19:52:27.56 |
-25:39:35.7 |
HIP 97851 |
15.04 |
| 2026-10-10 12:00 |
19:52:48.95 |
-25:39:08.4 |
HIP 97851 |
12.26 |
| 2026-10-11 00:00 |
19:53:10.59 |
-25:38:40.1 |
HIP 97851 |
10.99 |