메타데이터
| 항목 |
값 |
| Designation |
488P/NEAT-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-02-25T20:27:35.637120Z |
| Orbit solution date (soln_date, UTC) |
2024-10-26T00:12:33Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
15.700 |
| K1 |
16.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2002-08-29T05:09:46.368000Z |
| Discovery magnitude (MPC) |
19.00 R |
| Discovery observatory (MPC) |
644 · Palomar Mountain/NEAT |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-04-27.0000000 |
| e |
0.55045765 |
| q (au) |
1.679899 |
| a (au) |
3.736909 |
| i (deg) |
11.366619 |
| Ω (om, deg) |
324.110333 |
| ω (w, deg) |
1.302662 |
| M (ma, deg) |
157.742457 |
밝기
산란 + 전체 선형
$$
M_a = (15.185 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.185 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
08:14:10.96 |
+23:52:04.4 |
HIP 40421 |
15.12 |
| 2026-07-29 12:00 |
08:14:37.15 |
+23:50:27.8 |
HIP 40421 |
9.21 |
| 2026-07-30 00:00 |
08:15:03.31 |
+23:48:51.1 |
HIP 40421 |
4.23 |
| 2026-07-30 12:00 |
08:15:29.44 |
+23:47:14.4 |
HIP 40421 |
5.27 |
| 2026-07-31 00:00 |
08:15:55.54 |
+23:45:37.6 |
HIP 40421 |
10.68 |
| 2026-07-31 12:00 |
08:16:21.61 |
+23:44:00.8 |
HIP 40421 |
16.64 |
| 2026-08-01 00:00 |
08:16:47.65 |
+23:42:23.9 |
HIP 40421 |
22.71 |
| 2026-08-01 12:00 |
08:17:13.65 |
+23:40:47.0 |
HIP 40421 |
28.82 |
| 2026-08-02 00:00 |
08:17:39.63 |
+23:39:10.0 |
HIP 40833 |
33.63 |
| 2026-08-02 12:00 |
08:18:05.57 |
+23:37:33.0 |
HIP 40833 |
28.57 |
| 2026-08-03 00:00 |
08:18:31.48 |
+23:35:56.0 |
HIP 40833 |
24.02 |
| 2026-08-03 12:00 |
08:18:57.36 |
+23:34:18.9 |
HIP 40833 |
20.34 |
| 2026-08-04 00:00 |
08:19:23.20 |
+23:32:41.8 |
HIP 40833 |
18.04 |
| 2026-08-04 12:00 |
08:19:49.00 |
+23:31:04.7 |
HIP 40833 |
17.69 |
| 2026-08-05 00:00 |
08:20:14.77 |
+23:29:27.5 |
HIP 40915 |
18.35 |
| 2026-08-05 12:00 |
08:20:40.51 |
+23:27:50.4 |
HIP 40915 |
14.20 |
| 2026-08-06 00:00 |
08:21:06.21 |
+23:26:13.2 |
HIP 40915 |
11.89 |
| 2026-08-06 12:00 |
08:21:31.87 |
+23:24:35.9 |
HIP 40915 |
12.48 |
| 2026-08-07 00:00 |
08:21:57.49 |
+23:22:58.7 |
HIP 40915 |
15.64 |
| 2026-08-07 12:00 |
08:22:23.08 |
+23:21:21.4 |
HIP 40999 |
16.31 |
| 2026-08-08 00:00 |
08:22:48.63 |
+23:19:44.2 |
HIP 41133 |
15.76 |
| 2026-08-08 12:00 |
08:23:14.13 |
+23:18:06.9 |
HIP 41133 |
14.51 |
| 2026-08-09 00:00 |
08:23:39.60 |
+23:16:29.6 |
HIP 41133 |
15.69 |
| 2026-08-09 12:00 |
08:24:05.02 |
+23:14:52.4 |
HIP 41133 |
18.85 |
| 2026-08-10 00:00 |
08:24:30.41 |
+23:13:15.1 |
HIP 41133 |
23.19 |
| 2026-08-10 12:00 |
08:24:55.75 |
+23:11:37.8 |
HIP 41133 |
28.16 |
| 2026-08-11 00:00 |
08:25:21.04 |
+23:10:00.6 |
HIP 41435 |
26.16 |
| 2026-08-11 12:00 |
08:25:46.30 |
+23:08:23.4 |
HIP 41435 |
22.11 |
| 2026-08-12 00:00 |
08:26:11.50 |
+23:06:46.1 |
HIP 41460 |
17.22 |
| 2026-08-12 12:00 |
08:26:36.67 |
+23:05:08.9 |
HIP 41462 |
11.94 |
| 2026-08-13 00:00 |
08:27:01.78 |
+23:03:31.8 |
HIP 41462 |
7.65 |
| 2026-08-13 12:00 |
08:27:26.85 |
+23:01:54.6 |
HIP 41462 |
6.82 |
| 2026-08-14 00:00 |
08:27:51.87 |
+23:00:17.5 |
HIP 41462 |
10.30 |
| 2026-08-14 12:00 |
08:28:16.84 |
+22:58:40.5 |
HIP 41462 |
15.39 |
| 2026-08-15 00:00 |
08:28:41.77 |
+22:57:03.4 |
HIP 41462 |
20.94 |
| 2026-08-15 12:00 |
08:29:06.64 |
+22:55:26.5 |
HIP 41462 |
26.66 |
| 2026-08-16 00:00 |
08:29:31.46 |
+22:53:49.5 |
HIP 41687 |
27.76 |
| 2026-08-16 12:00 |
08:29:56.23 |
+22:52:12.6 |
HIP 41687 |
25.68 |
| 2026-08-17 00:00 |
08:30:20.95 |
+22:50:35.8 |
HIP 41687 |
24.87 |
| 2026-08-17 12:00 |
08:30:45.62 |
+22:48:59.0 |
HIP 41687 |
25.45 |
| 2026-08-18 00:00 |
08:31:10.23 |
+22:47:22.3 |
HIP 41687 |
27.32 |
| 2026-08-18 12:00 |
08:31:34.79 |
+22:45:45.7 |
HIP 41891 |
24.94 |
| 2026-08-19 00:00 |
08:31:59.30 |
+22:44:09.1 |
HIP 41891 |
20.93 |