메타데이터
| 항목 |
값 |
| Designation |
P/2007 Q2 (Gilmore) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-08-23T21:08:36.447360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:11Z |
| Obs used |
146 |
| NEO |
- |
| M1 |
16.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-09-13.0000000 |
| e |
0.67122948 |
| q (au) |
1.839016 |
| a (au) |
5.593616 |
| i (deg) |
10.238439 |
| Ω (om, deg) |
172.248957 |
| ω (w, deg) |
163.150307 |
| M (ma, deg) |
1.498898 |
밝기
산란 + 전체 선형
$$
M_a = (16.814 + 3.468\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.814 |
| n |
3.468 |
| gf |
0.979 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
09:46:09.94 |
+09:20:53.2 |
HIP 47862 |
30.85 |
| 2026-07-29 12:00 |
09:46:22.51 |
+09:19:57.2 |
HIP 47862 |
31.48 |
| 2026-07-30 00:00 |
09:46:35.09 |
+09:19:00.9 |
HIP 47862 |
32.43 |
| 2026-07-30 12:00 |
09:46:47.70 |
+09:18:04.4 |
HIP 47862 |
33.67 |
| 2026-07-31 00:00 |
09:47:00.32 |
+09:17:07.6 |
HIP 48146 |
33.52 |
| 2026-07-31 12:00 |
09:47:12.96 |
+09:16:10.6 |
HIP 48146 |
30.42 |
| 2026-08-01 00:00 |
09:47:25.62 |
+09:15:13.4 |
HIP 48146 |
27.34 |
| 2026-08-01 12:00 |
09:47:38.30 |
+09:14:16.0 |
HIP 48146 |
24.31 |
| 2026-08-02 00:00 |
09:47:50.99 |
+09:13:18.3 |
HIP 48146 |
21.35 |
| 2026-08-02 12:00 |
09:48:03.70 |
+09:12:20.4 |
HIP 48146 |
18.48 |
| 2026-08-03 00:00 |
09:48:16.43 |
+09:11:22.3 |
HIP 48146 |
15.77 |
| 2026-08-03 12:00 |
09:48:29.17 |
+09:10:24.0 |
HIP 48146 |
13.32 |
| 2026-08-04 00:00 |
09:48:41.92 |
+09:09:25.5 |
HIP 48146 |
11.30 |
| 2026-08-04 12:00 |
09:48:54.70 |
+09:08:26.7 |
HIP 48146 |
9.98 |
| 2026-08-05 00:00 |
09:49:07.48 |
+09:07:27.7 |
HIP 48146 |
9.67 |
| 2026-08-05 12:00 |
09:49:20.28 |
+09:06:28.6 |
HIP 48146 |
10.44 |
| 2026-08-06 00:00 |
09:49:33.09 |
+09:05:29.2 |
HIP 48146 |
12.10 |
| 2026-08-06 12:00 |
09:49:45.92 |
+09:04:29.6 |
HIP 48146 |
14.35 |
| 2026-08-07 00:00 |
09:49:58.75 |
+09:03:29.8 |
HIP 48146 |
16.96 |
| 2026-08-07 12:00 |
09:50:11.60 |
+09:02:29.8 |
HIP 48146 |
19.79 |
| 2026-08-08 00:00 |
09:50:24.46 |
+09:01:29.6 |
HIP 48146 |
22.75 |
| 2026-08-08 12:00 |
09:50:37.33 |
+09:00:29.2 |
HIP 48146 |
25.80 |
| 2026-08-09 00:00 |
09:50:50.21 |
+08:59:28.6 |
HIP 48146 |
28.92 |
| 2026-08-09 12:00 |
09:51:03.10 |
+08:58:27.9 |
HIP 48146 |
32.09 |
| 2026-08-10 00:00 |
09:51:16.00 |
+08:57:26.9 |
HIP 48370 |
34.16 |
| 2026-08-10 12:00 |
09:51:28.91 |
+08:56:25.8 |
HIP 48498 |
32.48 |
| 2026-08-11 00:00 |
09:51:41.82 |
+08:55:24.5 |
HIP 48498 |
29.17 |
| 2026-08-11 12:00 |
09:51:54.74 |
+08:54:23.0 |
HIP 48498 |
25.88 |
| 2026-08-12 00:00 |
09:52:07.67 |
+08:53:21.3 |
HIP 48498 |
22.61 |
| 2026-08-12 12:00 |
09:52:20.61 |
+08:52:19.5 |
HIP 48498 |
19.36 |
| 2026-08-13 00:00 |
09:52:33.55 |
+08:51:17.5 |
HIP 48498 |
16.14 |
| 2026-08-13 12:00 |
09:52:46.49 |
+08:50:15.4 |
HIP 48498 |
13.00 |
| 2026-08-14 00:00 |
09:52:59.44 |
+08:49:13.0 |
HIP 48498 |
10.01 |
| 2026-08-14 12:00 |
09:53:12.39 |
+08:48:10.6 |
HIP 48498 |
7.33 |
| 2026-08-15 00:00 |
09:53:25.35 |
+08:47:07.9 |
HIP 48498 |
5.48 |
| 2026-08-15 12:00 |
09:53:38.31 |
+08:46:05.2 |
HIP 48498 |
5.38 |
| 2026-08-16 00:00 |
09:53:51.27 |
+08:45:02.2 |
HIP 48498 |
7.11 |
| 2026-08-16 12:00 |
09:54:04.23 |
+08:43:59.2 |
HIP 48498 |
9.74 |
| 2026-08-17 00:00 |
09:54:17.19 |
+08:42:55.9 |
HIP 48498 |
12.72 |
| 2026-08-17 12:00 |
09:54:30.15 |
+08:41:52.6 |
HIP 48498 |
15.86 |
| 2026-08-18 00:00 |
09:54:43.11 |
+08:40:49.1 |
HIP 48498 |
19.08 |
| 2026-08-18 12:00 |
09:54:56.08 |
+08:39:45.5 |
HIP 48498 |
22.35 |
| 2026-08-19 00:00 |
09:55:09.04 |
+08:38:41.8 |
HIP 48498 |
25.64 |