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) |
| 2026-07-29 00:00 |
19:53:41.31 |
-23:05:15.3 |
HIP 97834 |
12.39 |
| 2026-07-29 12:00 |
19:53:21.54 |
-23:07:52.7 |
HIP 97834 |
7.30 |
| 2026-07-30 00:00 |
19:53:01.87 |
-23:10:29.2 |
HIP 97834 |
2.86 |
| 2026-07-30 12:00 |
19:52:42.33 |
-23:13:04.6 |
HIP 97834 |
4.16 |
| 2026-07-31 00:00 |
19:52:22.92 |
-23:15:39.1 |
HIP 97834 |
8.93 |
| 2026-07-31 12:00 |
19:52:03.63 |
-23:18:12.5 |
HIP 97834 |
13.93 |
| 2026-08-01 00:00 |
19:51:44.48 |
-23:20:44.8 |
HIP 97834 |
18.96 |
| 2026-08-01 12:00 |
19:51:25.47 |
-23:23:16.0 |
HIP 97834 |
23.97 |
| 2026-08-02 00:00 |
19:51:06.60 |
-23:25:46.2 |
HIP 97834 |
28.95 |
| 2026-08-02 12:00 |
19:50:47.89 |
-23:28:15.2 |
HIP 97834 |
33.90 |
| 2026-08-03 00:00 |
19:50:29.33 |
-23:30:43.2 |
HIP 97805 |
38.07 |
| 2026-08-03 12:00 |
19:50:10.94 |
-23:33:09.9 |
HIP 97805 |
39.71 |
| 2026-08-04 00:00 |
19:49:52.72 |
-23:35:35.5 |
HIP 97349 |
38.79 |
| 2026-08-04 12:00 |
19:49:34.66 |
-23:38:00.0 |
HIP 97349 |
34.26 |
| 2026-08-05 00:00 |
19:49:16.79 |
-23:40:23.2 |
HIP 97349 |
29.84 |
| 2026-08-05 12:00 |
19:48:59.09 |
-23:42:45.2 |
HIP 97349 |
25.59 |
| 2026-08-06 00:00 |
19:48:41.59 |
-23:45:06.0 |
HIP 97349 |
21.57 |
| 2026-08-06 12:00 |
19:48:24.27 |
-23:47:25.6 |
HIP 97349 |
17.90 |
| 2026-08-07 00:00 |
19:48:07.16 |
-23:49:43.9 |
HIP 97349 |
14.79 |
| 2026-08-07 12:00 |
19:47:50.25 |
-23:52:01.0 |
HIP 97349 |
12.61 |
| 2026-08-08 00:00 |
19:47:33.54 |
-23:54:16.8 |
HIP 97349 |
11.82 |
| 2026-08-08 12:00 |
19:47:17.05 |
-23:56:31.3 |
HIP 97349 |
12.63 |
| 2026-08-09 00:00 |
19:47:00.78 |
-23:58:44.5 |
HIP 97349 |
14.74 |
| 2026-08-09 12:00 |
19:46:44.72 |
-24:00:56.4 |
HIP 97349 |
17.64 |
| 2026-08-10 00:00 |
19:46:28.90 |
-24:03:07.0 |
HIP 97349 |
20.97 |
| 2026-08-10 12:00 |
19:46:13.31 |
-24:05:16.2 |
HIP 97349 |
24.53 |
| 2026-08-11 00:00 |
19:45:57.95 |
-24:07:24.2 |
HIP 97349 |
28.21 |
| 2026-08-11 12:00 |
19:45:42.83 |
-24:09:30.7 |
HIP 97349 |
31.94 |
| 2026-08-12 00:00 |
19:45:27.96 |
-24:11:35.9 |
HIP 97349 |
35.68 |
| 2026-08-12 12:00 |
19:45:13.34 |
-24:13:39.7 |
HIP 96967 |
36.74 |
| 2026-08-13 00:00 |
19:44:58.98 |
-24:15:42.2 |
HIP 96967 |
33.08 |
| 2026-08-13 12:00 |
19:44:44.87 |
-24:17:43.3 |
HIP 96967 |
29.53 |
| 2026-08-14 00:00 |
19:44:31.03 |
-24:19:42.9 |
HIP 96967 |
26.12 |
| 2026-08-14 12:00 |
19:44:17.45 |
-24:21:41.2 |
HIP 96967 |
22.87 |
| 2026-08-15 00:00 |
19:44:04.14 |
-24:23:38.1 |
HIP 96967 |
19.83 |
| 2026-08-15 12:00 |
19:43:51.10 |
-24:25:33.5 |
HIP 96967 |
17.07 |
| 2026-08-16 00:00 |
19:43:38.34 |
-24:27:27.5 |
HIP 96967 |
14.71 |
| 2026-08-16 12:00 |
19:43:25.87 |
-24:29:20.2 |
HIP 96967 |
12.89 |
| 2026-08-17 00:00 |
19:43:13.67 |
-24:31:11.3 |
HIP 96967 |
11.84 |
| 2026-08-17 12:00 |
19:43:01.76 |
-24:33:01.1 |
HIP 96967 |
11.69 |
| 2026-08-18 00:00 |
19:42:50.15 |
-24:34:49.4 |
HIP 96967 |
12.42 |
| 2026-08-18 12:00 |
19:42:38.82 |
-24:36:36.3 |
HIP 96967 |
13.85 |
| 2026-08-19 00:00 |
19:42:27.79 |
-24:38:21.8 |
HIP 96938 |
13.24 |