메타데이터
| 항목 |
값 |
| Designation |
C/2002 J4 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-10-03T04:21:57.335040Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:21Z |
| Obs used |
228 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2003-04-06.0000000 |
| e |
0.99989069 |
| q (au) |
3.633732 |
| a (au) |
33243.727305 |
| i (deg) |
46.525144 |
| Ω (om, deg) |
70.884245 |
| ω (w, deg) |
230.709337 |
| M (ma, deg) |
359.999971 |
밝기
산란 + 전체 선형
$$
M_a = (8.255 + 3.626\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.255 |
| n |
3.626 |
| gf |
0.983 |
| gb |
-0.894 |
| k |
0.999 |
| δ90 |
9.909 |
| 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 |
05:30:17.18 |
+35:11:15.1 |
HIP 25735 |
8.33 |
| 2026-09-20 12:00 |
05:30:17.03 |
+35:11:25.5 |
HIP 25735 |
8.40 |
| 2026-09-21 00:00 |
05:30:16.85 |
+35:11:36.0 |
HIP 25735 |
8.48 |
| 2026-09-21 12:00 |
05:30:16.64 |
+35:11:46.4 |
HIP 25735 |
8.55 |
| 2026-09-22 00:00 |
05:30:16.41 |
+35:11:56.8 |
HIP 25735 |
8.62 |
| 2026-09-22 12:00 |
05:30:16.14 |
+35:12:07.2 |
HIP 25735 |
8.68 |
| 2026-09-23 00:00 |
05:30:15.85 |
+35:12:17.5 |
HIP 25735 |
8.75 |
| 2026-09-23 12:00 |
05:30:15.52 |
+35:12:27.9 |
HIP 25735 |
8.82 |
| 2026-09-24 00:00 |
05:30:15.17 |
+35:12:38.2 |
HIP 25735 |
8.88 |
| 2026-09-24 12:00 |
05:30:14.79 |
+35:12:48.5 |
HIP 25735 |
8.94 |
| 2026-09-25 00:00 |
05:30:14.38 |
+35:12:58.7 |
HIP 25735 |
9.01 |
| 2026-09-25 12:00 |
05:30:13.94 |
+35:13:09.0 |
HIP 25735 |
9.07 |
| 2026-09-26 00:00 |
05:30:13.47 |
+35:13:19.2 |
HIP 25735 |
9.13 |
| 2026-09-26 12:00 |
05:30:12.97 |
+35:13:29.4 |
HIP 25735 |
9.19 |
| 2026-09-27 00:00 |
05:30:12.44 |
+35:13:39.5 |
HIP 25735 |
9.25 |
| 2026-09-27 12:00 |
05:30:11.89 |
+35:13:49.6 |
HIP 25735 |
9.31 |
| 2026-09-28 00:00 |
05:30:11.30 |
+35:13:59.7 |
HIP 25735 |
9.37 |
| 2026-09-28 12:00 |
05:30:10.69 |
+35:14:09.8 |
HIP 25735 |
9.43 |
| 2026-09-29 00:00 |
05:30:10.04 |
+35:14:19.8 |
HIP 25735 |
9.49 |
| 2026-09-29 12:00 |
05:30:09.37 |
+35:14:29.8 |
HIP 25735 |
9.55 |
| 2026-09-30 00:00 |
05:30:08.67 |
+35:14:39.8 |
HIP 25733 |
9.47 |
| 2026-09-30 12:00 |
05:30:07.94 |
+35:14:49.8 |
HIP 25733 |
9.25 |
| 2026-10-01 00:00 |
05:30:07.18 |
+35:14:59.7 |
HIP 25733 |
9.02 |
| 2026-10-01 12:00 |
05:30:06.39 |
+35:15:09.5 |
HIP 25733 |
8.80 |
| 2026-10-02 00:00 |
05:30:05.57 |
+35:15:19.4 |
HIP 25733 |
8.57 |
| 2026-10-02 12:00 |
05:30:04.73 |
+35:15:29.2 |
HIP 25733 |
8.34 |
| 2026-10-03 00:00 |
05:30:03.85 |
+35:15:39.0 |
HIP 25733 |
8.10 |
| 2026-10-03 12:00 |
05:30:02.95 |
+35:15:48.7 |
HIP 25733 |
7.87 |
| 2026-10-04 00:00 |
05:30:02.02 |
+35:15:58.4 |
HIP 25733 |
7.63 |
| 2026-10-04 12:00 |
05:30:01.06 |
+35:16:08.0 |
HIP 25733 |
7.39 |
| 2026-10-05 00:00 |
05:30:00.07 |
+35:16:17.7 |
HIP 25733 |
7.15 |
| 2026-10-05 12:00 |
05:29:59.05 |
+35:16:27.2 |
HIP 25733 |
6.91 |
| 2026-10-06 00:00 |
05:29:58.01 |
+35:16:36.8 |
HIP 25733 |
6.67 |
| 2026-10-06 12:00 |
05:29:56.93 |
+35:16:46.3 |
HIP 25733 |
6.43 |
| 2026-10-07 00:00 |
05:29:55.83 |
+35:16:55.8 |
HIP 25733 |
6.19 |
| 2026-10-07 12:00 |
05:29:54.69 |
+35:17:05.2 |
HIP 25733 |
5.95 |
| 2026-10-08 00:00 |
05:29:53.53 |
+35:17:14.6 |
HIP 25733 |
5.71 |
| 2026-10-08 12:00 |
05:29:52.34 |
+35:17:23.9 |
HIP 25733 |
5.47 |
| 2026-10-09 00:00 |
05:29:51.13 |
+35:17:33.2 |
HIP 25733 |
5.24 |
| 2026-10-09 12:00 |
05:29:49.88 |
+35:17:42.4 |
HIP 25733 |
5.02 |
| 2026-10-10 00:00 |
05:29:48.61 |
+35:17:51.6 |
HIP 25733 |
4.80 |
| 2026-10-10 12:00 |
05:29:47.31 |
+35:18:00.8 |
HIP 25733 |
4.59 |
| 2026-10-11 00:00 |
05:29:45.98 |
+35:18:09.9 |
HIP 25733 |
4.39 |