메타데이터
| 항목 |
값 |
| Designation |
P/2012 NJ (La Sagra) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-06-13T02:10:00.287040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:19Z |
| Obs used |
2490 |
| NEO |
Yes |
| M1 |
14.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-08-19.0000000 |
| e |
0.84806204 |
| q (au) |
1.291890 |
| a (au) |
8.502747 |
| i (deg) |
84.375461 |
| Ω (om, deg) |
315.763185 |
| ω (w, deg) |
338.413906 |
| M (ma, deg) |
2.659833 |
밝기
산란 + 전체 선형
$$
M_a = (15.413 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.413 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-03-26 00:00 |
09:17:24.57 |
+35:38:30.0 |
HIP 45702 |
19.49 |
| 2026-03-26 12:00 |
09:17:18.05 |
+35:38:11.5 |
HIP 45702 |
20.84 |
| 2026-03-27 00:00 |
09:17:11.60 |
+35:37:52.6 |
HIP 45661 |
22.04 |
| 2026-03-27 12:00 |
09:17:05.21 |
+35:37:33.2 |
HIP 45661 |
22.73 |
| 2026-03-28 00:00 |
09:16:58.90 |
+35:37:13.4 |
HIP 45661 |
23.46 |
| 2026-03-28 12:00 |
09:16:52.65 |
+35:36:53.1 |
HIP 45661 |
24.22 |
| 2026-03-29 00:00 |
09:16:46.47 |
+35:36:32.4 |
HIP 45661 |
25.02 |
| 2026-03-29 12:00 |
09:16:40.36 |
+35:36:11.2 |
HIP 45661 |
25.84 |
| 2026-03-30 00:00 |
09:16:34.31 |
+35:35:49.6 |
HIP 45438 |
25.91 |
| 2026-03-30 12:00 |
09:16:28.34 |
+35:35:27.5 |
HIP 45438 |
25.71 |
| 2026-03-31 00:00 |
09:16:22.44 |
+35:35:05.0 |
HIP 45438 |
25.59 |
| 2026-03-31 12:00 |
09:16:16.60 |
+35:34:42.1 |
HIP 45334 |
25.20 |
| 2026-04-01 00:00 |
09:16:10.84 |
+35:34:18.8 |
HIP 45334 |
24.27 |
| 2026-04-01 12:00 |
09:16:05.15 |
+35:33:55.0 |
HIP 45334 |
23.37 |
| 2026-04-02 00:00 |
09:15:59.52 |
+35:33:30.8 |
HIP 45334 |
22.53 |
| 2026-04-02 12:00 |
09:15:53.97 |
+35:33:06.2 |
HIP 45334 |
21.73 |
| 2026-04-03 00:00 |
09:15:48.49 |
+35:32:41.1 |
HIP 45334 |
20.99 |
| 2026-04-03 12:00 |
09:15:43.08 |
+35:32:15.7 |
HIP 45334 |
20.31 |
| 2026-04-04 00:00 |
09:15:37.75 |
+35:31:49.8 |
HIP 45334 |
19.68 |
| 2026-04-04 12:00 |
09:15:32.48 |
+35:31:23.5 |
HIP 45334 |
19.13 |
| 2026-04-05 00:00 |
09:15:27.29 |
+35:30:56.8 |
HIP 45334 |
18.65 |
| 2026-04-05 12:00 |
09:15:22.17 |
+35:30:29.7 |
HIP 45334 |
18.24 |
| 2026-04-06 00:00 |
09:15:17.13 |
+35:30:02.2 |
HIP 45334 |
17.90 |
| 2026-04-06 12:00 |
09:15:12.16 |
+35:29:34.2 |
HIP 45334 |
17.65 |
| 2026-04-07 00:00 |
09:15:07.26 |
+35:29:05.9 |
HIP 45334 |
17.48 |
| 2026-04-07 12:00 |
09:15:02.43 |
+35:28:37.2 |
HIP 45334 |
17.39 |
| 2026-04-08 00:00 |
09:14:57.68 |
+35:28:08.1 |
HIP 45334 |
17.38 |
| 2026-04-08 12:00 |
09:14:53.01 |
+35:27:38.6 |
HIP 45334 |
17.45 |
| 2026-04-09 00:00 |
09:14:48.41 |
+35:27:08.7 |
HIP 45334 |
17.59 |
| 2026-04-09 12:00 |
09:14:43.88 |
+35:26:38.4 |
HIP 45334 |
17.81 |
| 2026-04-10 00:00 |
09:14:39.43 |
+35:26:07.7 |
HIP 45334 |
18.09 |
| 2026-04-10 12:00 |
09:14:35.05 |
+35:25:36.7 |
HIP 45334 |
18.44 |
| 2026-04-11 00:00 |
09:14:30.75 |
+35:25:05.2 |
HIP 45334 |
18.85 |
| 2026-04-11 12:00 |
09:14:26.53 |
+35:24:33.4 |
HIP 45334 |
19.30 |
| 2026-04-12 00:00 |
09:14:22.38 |
+35:24:01.2 |
HIP 45334 |
19.81 |
| 2026-04-12 12:00 |
09:14:18.31 |
+35:23:28.6 |
HIP 45258 |
20.25 |
| 2026-04-13 00:00 |
09:14:14.31 |
+35:22:55.7 |
HIP 45258 |
19.35 |
| 2026-04-13 12:00 |
09:14:10.39 |
+35:22:22.4 |
HIP 45258 |
18.47 |
| 2026-04-14 00:00 |
09:14:06.55 |
+35:21:48.7 |
HIP 45258 |
17.59 |
| 2026-04-14 12:00 |
09:14:02.78 |
+35:21:14.7 |
HIP 45258 |
16.73 |
| 2026-04-15 00:00 |
09:13:59.09 |
+35:20:40.3 |
HIP 45258 |
15.88 |
| 2026-04-15 12:00 |
09:13:55.48 |
+35:20:05.6 |
HIP 45258 |
15.05 |
| 2026-04-16 00:00 |
09:13:51.95 |
+35:19:30.5 |
HIP 45258 |
14.22 |