메타데이터
| 항목 |
값 |
| Designation |
C/2001 O2 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-10-17T08:10:25.610880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:10Z |
| Obs used |
73 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2001-09-20.0000000 |
| e |
0.99779815 |
| q (au) |
4.819418 |
| a (au) |
2188.798835 |
| i (deg) |
90.926212 |
| Ω (om, deg) |
328.716022 |
| ω (w, deg) |
280.894802 |
| M (ma, deg) |
0.006773 |
밝기
산란 + 전체 선형
$$
M_a = (7.744 + 3.176\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.744 |
| n |
3.176 |
| gf |
0.893 |
| gb |
-0.966 |
| k |
1.000 |
| δ90 |
4.079 |
| 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) |
| 2026-09-20 00:00 |
20:06:11.59 |
+46:44:48.6 |
HIP 98950 |
9.07 |
| 2026-09-20 12:00 |
20:06:09.55 |
+46:44:18.8 |
HIP 98950 |
8.52 |
| 2026-09-21 00:00 |
20:06:07.53 |
+46:43:48.8 |
HIP 98950 |
7.99 |
| 2026-09-21 12:00 |
20:06:05.54 |
+46:43:18.7 |
HIP 98950 |
7.47 |
| 2026-09-22 00:00 |
20:06:03.58 |
+46:42:48.5 |
HIP 98950 |
6.97 |
| 2026-09-22 12:00 |
20:06:01.65 |
+46:42:18.1 |
HIP 98950 |
6.48 |
| 2026-09-23 00:00 |
20:05:59.74 |
+46:41:47.7 |
HIP 98950 |
6.03 |
| 2026-09-23 12:00 |
20:05:57.87 |
+46:41:17.1 |
HIP 98950 |
5.61 |
| 2026-09-24 00:00 |
20:05:56.02 |
+46:40:46.3 |
HIP 98950 |
5.23 |
| 2026-09-24 12:00 |
20:05:54.20 |
+46:40:15.5 |
HIP 98950 |
4.90 |
| 2026-09-25 00:00 |
20:05:52.41 |
+46:39:44.6 |
HIP 98950 |
4.62 |
| 2026-09-25 12:00 |
20:05:50.65 |
+46:39:13.5 |
HIP 98950 |
4.42 |
| 2026-09-26 00:00 |
20:05:48.91 |
+46:38:42.3 |
HIP 98950 |
4.30 |
| 2026-09-26 12:00 |
20:05:47.21 |
+46:38:11.0 |
HIP 98950 |
4.26 |
| 2026-09-27 00:00 |
20:05:45.53 |
+46:37:39.6 |
HIP 98950 |
4.32 |
| 2026-09-27 12:00 |
20:05:43.88 |
+46:37:08.1 |
HIP 98950 |
4.46 |
| 2026-09-28 00:00 |
20:05:42.27 |
+46:36:36.5 |
HIP 98950 |
4.67 |
| 2026-09-28 12:00 |
20:05:40.68 |
+46:36:04.8 |
HIP 98950 |
4.95 |
| 2026-09-29 00:00 |
20:05:39.12 |
+46:35:33.0 |
HIP 98950 |
5.29 |
| 2026-09-29 12:00 |
20:05:37.59 |
+46:35:01.2 |
HIP 98950 |
5.67 |
| 2026-09-30 00:00 |
20:05:36.09 |
+46:34:29.2 |
HIP 98950 |
6.09 |
| 2026-09-30 12:00 |
20:05:34.62 |
+46:33:57.1 |
HIP 98950 |
6.54 |
| 2026-10-01 00:00 |
20:05:33.18 |
+46:33:25.0 |
HIP 98950 |
7.01 |
| 2026-10-01 12:00 |
20:05:31.77 |
+46:32:52.7 |
HIP 98950 |
7.50 |
| 2026-10-02 00:00 |
20:05:30.39 |
+46:32:20.4 |
HIP 98950 |
8.01 |
| 2026-10-02 12:00 |
20:05:29.03 |
+46:31:48.0 |
HIP 98950 |
8.53 |
| 2026-10-03 00:00 |
20:05:27.71 |
+46:31:15.5 |
HIP 98950 |
9.06 |
| 2026-10-03 12:00 |
20:05:26.42 |
+46:30:43.0 |
HIP 98950 |
9.59 |
| 2026-10-04 00:00 |
20:05:25.16 |
+46:30:10.3 |
HIP 98950 |
10.14 |
| 2026-10-04 12:00 |
20:05:23.93 |
+46:29:37.6 |
HIP 98950 |
10.69 |
| 2026-10-05 00:00 |
20:05:22.74 |
+46:29:04.9 |
HIP 98950 |
11.24 |
| 2026-10-05 12:00 |
20:05:21.57 |
+46:28:32.1 |
HIP 98950 |
11.80 |
| 2026-10-06 00:00 |
20:05:20.43 |
+46:27:59.2 |
HIP 98950 |
12.36 |
| 2026-10-06 12:00 |
20:05:19.32 |
+46:27:26.2 |
HIP 98950 |
12.92 |
| 2026-10-07 00:00 |
20:05:18.25 |
+46:26:53.2 |
HIP 98950 |
13.48 |
| 2026-10-07 12:00 |
20:05:17.20 |
+46:26:20.2 |
HIP 98950 |
14.05 |
| 2026-10-08 00:00 |
20:05:16.19 |
+46:25:47.1 |
HIP 98950 |
14.62 |
| 2026-10-08 12:00 |
20:05:15.21 |
+46:25:13.9 |
HIP 98950 |
15.18 |
| 2026-10-09 00:00 |
20:05:14.25 |
+46:24:40.7 |
HIP 98950 |
15.75 |
| 2026-10-09 12:00 |
20:05:13.33 |
+46:24:07.5 |
HIP 98950 |
16.32 |
| 2026-10-10 00:00 |
20:05:12.44 |
+46:23:34.2 |
HIP 98950 |
16.89 |
| 2026-10-10 12:00 |
20:05:11.59 |
+46:23:00.9 |
HIP 98950 |
17.46 |
| 2026-10-11 00:00 |
20:05:10.76 |
+46:22:27.6 |
HIP 98950 |
18.03 |