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) |
| 2026-09-20 00:00 |
09:38:20.34 |
+31:19:27.7 |
HIP 47168 |
23.01 |
| 2026-09-20 12:00 |
09:38:26.72 |
+31:19:08.1 |
HIP 47168 |
24.12 |
| 2026-09-21 00:00 |
09:38:33.07 |
+31:18:48.9 |
HIP 47168 |
25.26 |
| 2026-09-21 12:00 |
09:38:39.38 |
+31:18:30.1 |
HIP 47222 |
26.18 |
| 2026-09-22 00:00 |
09:38:45.65 |
+31:18:11.6 |
HIP 47222 |
26.76 |
| 2026-09-22 12:00 |
09:38:51.89 |
+31:17:53.5 |
HIP 47222 |
27.39 |
| 2026-09-23 00:00 |
09:38:58.09 |
+31:17:35.8 |
HIP 47222 |
28.08 |
| 2026-09-23 12:00 |
09:39:04.25 |
+31:17:18.4 |
HIP 47477 |
27.66 |
| 2026-09-24 00:00 |
09:39:10.37 |
+31:17:01.4 |
HIP 47477 |
26.89 |
| 2026-09-24 12:00 |
09:39:16.45 |
+31:16:44.8 |
HIP 47477 |
26.17 |
| 2026-09-25 00:00 |
09:39:22.49 |
+31:16:28.5 |
HIP 47477 |
25.51 |
| 2026-09-25 12:00 |
09:39:28.50 |
+31:16:12.6 |
HIP 47477 |
24.89 |
| 2026-09-26 00:00 |
09:39:34.46 |
+31:15:57.1 |
HIP 47477 |
24.33 |
| 2026-09-26 12:00 |
09:39:40.38 |
+31:15:42.0 |
HIP 47477 |
23.82 |
| 2026-09-27 00:00 |
09:39:46.26 |
+31:15:27.2 |
HIP 47544 |
23.29 |
| 2026-09-27 12:00 |
09:39:52.10 |
+31:15:12.8 |
HIP 47544 |
22.06 |
| 2026-09-28 00:00 |
09:39:57.90 |
+31:14:58.7 |
HIP 47544 |
20.84 |
| 2026-09-28 12:00 |
09:40:03.66 |
+31:14:45.1 |
HIP 47544 |
19.64 |
| 2026-09-29 00:00 |
09:40:09.37 |
+31:14:31.8 |
HIP 47544 |
18.45 |
| 2026-09-29 12:00 |
09:40:15.04 |
+31:14:18.9 |
HIP 47544 |
17.27 |
| 2026-09-30 00:00 |
09:40:20.67 |
+31:14:06.4 |
HIP 47544 |
16.11 |
| 2026-09-30 12:00 |
09:40:26.25 |
+31:13:54.3 |
HIP 47544 |
14.97 |
| 2026-10-01 00:00 |
09:40:31.79 |
+31:13:42.5 |
HIP 47544 |
13.85 |
| 2026-10-01 12:00 |
09:40:37.29 |
+31:13:31.2 |
HIP 47544 |
12.75 |
| 2026-10-02 00:00 |
09:40:42.74 |
+31:13:20.2 |
HIP 47544 |
11.68 |
| 2026-10-02 12:00 |
09:40:48.14 |
+31:13:09.6 |
HIP 47544 |
10.63 |
| 2026-10-03 00:00 |
09:40:53.50 |
+31:12:59.4 |
HIP 47544 |
9.62 |
| 2026-10-03 12:00 |
09:40:58.81 |
+31:12:49.6 |
HIP 47544 |
8.66 |
| 2026-10-04 00:00 |
09:41:04.07 |
+31:12:40.2 |
HIP 47544 |
7.75 |
| 2026-10-04 12:00 |
09:41:09.29 |
+31:12:31.1 |
HIP 47544 |
6.90 |
| 2026-10-05 00:00 |
09:41:14.46 |
+31:12:22.5 |
HIP 47544 |
6.16 |
| 2026-10-05 12:00 |
09:41:19.58 |
+31:12:14.3 |
HIP 47544 |
5.54 |
| 2026-10-06 00:00 |
09:41:24.65 |
+31:12:06.4 |
HIP 47544 |
5.08 |
| 2026-10-06 12:00 |
09:41:29.68 |
+31:11:59.0 |
HIP 47544 |
4.83 |
| 2026-10-07 00:00 |
09:41:34.65 |
+31:11:51.9 |
HIP 47544 |
4.81 |
| 2026-10-07 12:00 |
09:41:39.57 |
+31:11:45.2 |
HIP 47544 |
5.01 |
| 2026-10-08 00:00 |
09:41:44.44 |
+31:11:39.0 |
HIP 47544 |
5.40 |
| 2026-10-08 12:00 |
09:41:49.27 |
+31:11:33.1 |
HIP 47544 |
5.95 |
| 2026-10-09 00:00 |
09:41:54.04 |
+31:11:27.7 |
HIP 47544 |
6.60 |
| 2026-10-09 12:00 |
09:41:58.75 |
+31:11:22.6 |
HIP 47544 |
7.32 |
| 2026-10-10 00:00 |
09:42:03.42 |
+31:11:18.0 |
HIP 47544 |
8.09 |
| 2026-10-10 12:00 |
09:42:08.03 |
+31:11:13.7 |
HIP 47544 |
8.90 |
| 2026-10-11 00:00 |
09:42:12.59 |
+31:11:09.9 |
HIP 47544 |
9.72 |