메타데이터
| 항목 |
값 |
| Designation |
505P/Palomar |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-09-27T02:30:29.422080Z |
| Orbit solution date (soln_date, UTC) |
2025-08-01T17:26:05Z |
| Obs used |
84 |
| NEO |
- |
| M1 |
16.800 |
| K1 |
5.250 |
| 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) |
2014-09-06.0000000 |
| e |
0.31923792 |
| q (au) |
2.775295 |
| a (au) |
4.076748 |
| i (deg) |
11.483482 |
| Ω (om, deg) |
112.299648 |
| ω (w, deg) |
144.977424 |
| M (ma, deg) |
226.239740 |
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) |
| 2026-03-26 00:00 |
19:31:02.85 |
-17:59:24.2 |
HIP 96023 |
19.75 |
| 2026-03-26 12:00 |
19:31:40.72 |
-17:58:45.9 |
HIP 96023 |
18.72 |
| 2026-03-27 00:00 |
19:32:18.40 |
-17:58:07.7 |
HIP 96023 |
21.76 |
| 2026-03-27 12:00 |
19:32:55.91 |
-17:57:29.6 |
HIP 96291 |
26.97 |
| 2026-03-28 00:00 |
19:33:33.22 |
-17:56:51.5 |
HIP 96291 |
19.07 |
| 2026-03-28 12:00 |
19:34:10.36 |
-17:56:13.5 |
HIP 96291 |
12.60 |
| 2026-03-29 00:00 |
19:34:47.30 |
-17:55:35.5 |
HIP 96291 |
10.52 |
| 2026-03-29 12:00 |
19:35:24.06 |
-17:54:57.7 |
HIP 96291 |
14.72 |
| 2026-03-30 00:00 |
19:36:00.63 |
-17:54:20.0 |
HIP 96291 |
21.78 |
| 2026-03-30 12:00 |
19:36:37.01 |
-17:53:42.4 |
HIP 96496 |
21.10 |
| 2026-03-31 00:00 |
19:37:13.19 |
-17:53:05.0 |
HIP 96496 |
20.91 |
| 2026-03-31 12:00 |
19:37:49.19 |
-17:52:27.7 |
HIP 96496 |
24.01 |
| 2026-04-01 00:00 |
19:38:24.99 |
-17:51:50.6 |
HIP 96496 |
29.35 |
| 2026-04-01 12:00 |
19:39:00.60 |
-17:51:13.7 |
HIP 96496 |
35.91 |
| 2026-04-02 00:00 |
19:39:36.02 |
-17:50:37.0 |
HIP 96921 |
36.83 |
| 2026-04-02 12:00 |
19:40:11.23 |
-17:50:00.5 |
HIP 96921 |
28.94 |
| 2026-04-03 00:00 |
19:40:46.25 |
-17:49:24.2 |
HIP 96921 |
21.48 |
| 2026-04-03 12:00 |
19:41:21.07 |
-17:48:48.2 |
HIP 96921 |
15.03 |
| 2026-04-04 00:00 |
19:41:55.69 |
-17:48:12.4 |
HIP 96921 |
11.32 |
| 2026-04-04 12:00 |
19:42:30.11 |
-17:47:36.9 |
HIP 96921 |
12.90 |
| 2026-04-05 00:00 |
19:43:04.32 |
-17:47:01.6 |
HIP 96921 |
18.38 |
| 2026-04-05 12:00 |
19:43:38.33 |
-17:46:26.7 |
HIP 96921 |
25.30 |
| 2026-04-06 00:00 |
19:44:12.13 |
-17:45:52.0 |
HIP 97192 |
22.10 |
| 2026-04-06 12:00 |
19:44:45.73 |
-17:45:17.7 |
HIP 97192 |
17.24 |
| 2026-04-07 00:00 |
19:45:19.11 |
-17:44:43.7 |
HIP 97192 |
15.34 |
| 2026-04-07 12:00 |
19:45:52.29 |
-17:44:10.1 |
HIP 97192 |
17.31 |
| 2026-04-08 00:00 |
19:46:25.25 |
-17:43:36.8 |
HIP 97192 |
22.09 |
| 2026-04-08 12:00 |
19:46:58.00 |
-17:43:04.0 |
HIP 97419 |
20.60 |
| 2026-04-09 00:00 |
19:47:30.54 |
-17:42:31.5 |
HIP 97419 |
15.46 |
| 2026-04-09 12:00 |
19:48:02.86 |
-17:41:59.4 |
HIP 97419 |
13.21 |
| 2026-04-10 00:00 |
19:48:34.96 |
-17:41:27.8 |
HIP 97419 |
15.12 |
| 2026-04-10 12:00 |
19:49:06.84 |
-17:40:56.6 |
HIP 97419 |
19.97 |
| 2026-04-11 00:00 |
19:49:38.51 |
-17:40:25.9 |
HIP 97596 |
18.80 |
| 2026-04-11 12:00 |
19:50:09.94 |
-17:39:55.6 |
HIP 97596 |
17.33 |
| 2026-04-12 00:00 |
19:50:41.16 |
-17:39:25.9 |
HIP 97596 |
18.95 |
| 2026-04-12 12:00 |
19:51:12.15 |
-17:38:56.6 |
HIP 97596 |
22.95 |
| 2026-04-13 00:00 |
19:51:42.91 |
-17:38:27.9 |
HIP 97740 |
22.42 |
| 2026-04-13 12:00 |
19:52:13.45 |
-17:37:59.7 |
HIP 97740 |
22.97 |
| 2026-04-14 00:00 |
19:52:43.75 |
-17:37:32.0 |
HIP 97740 |
25.64 |
| 2026-04-14 12:00 |
19:53:13.82 |
-17:37:04.9 |
HIP 97740 |
29.84 |
| 2026-04-15 00:00 |
19:53:43.66 |
-17:36:38.4 |
HIP 98054 |
27.28 |
| 2026-04-15 12:00 |
19:54:13.26 |
-17:36:12.6 |
HIP 98054 |
20.22 |
| 2026-04-16 00:00 |
19:54:42.63 |
-17:35:47.3 |
HIP 98054 |
13.23 |