메타데이터
| 항목 |
값 |
| Designation |
231P/LINEAR-NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-05-16T10:36:59.662080Z |
| Orbit solution date (soln_date, UTC) |
2026-07-06T12:12:42Z |
| Obs used |
576 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
20.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-06-10.0000000 |
| e |
0.24682371 |
| q (au) |
3.032335 |
| a (au) |
4.026063 |
| i (deg) |
12.325715 |
| Ω (om, deg) |
133.081275 |
| ω (w, deg) |
42.428233 |
| M (ma, deg) |
47.650599 |
밝기
산란 + 전체 선형
$$
M_a = (15.502 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.502 |
| n |
2.000 |
| gf |
0.896 |
| gb |
-0.523 |
| k |
0.877 |
| δ90 |
3.512 |
| 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 |
07:33:31.51 |
+17:38:59.5 |
HIP 36637 |
28.94 |
| 2026-07-29 12:00 |
07:34:13.03 |
+17:38:02.6 |
HIP 36903 |
22.33 |
| 2026-07-30 00:00 |
07:34:54.54 |
+17:37:05.0 |
HIP 36921 |
15.80 |
| 2026-07-30 12:00 |
07:35:36.03 |
+17:36:06.7 |
HIP 36921 |
13.41 |
| 2026-07-31 00:00 |
07:36:17.51 |
+17:35:07.7 |
HIP 36921 |
17.53 |
| 2026-07-31 12:00 |
07:36:58.98 |
+17:34:08.0 |
HIP 37160 |
23.86 |
| 2026-08-01 00:00 |
07:37:40.43 |
+17:33:07.6 |
HIP 37160 |
18.91 |
| 2026-08-01 12:00 |
07:38:21.87 |
+17:32:06.5 |
HIP 37300 |
17.97 |
| 2026-08-02 00:00 |
07:39:03.29 |
+17:31:04.7 |
HIP 37300 |
11.16 |
| 2026-08-02 12:00 |
07:39:44.70 |
+17:30:02.3 |
HIP 37300 |
11.12 |
| 2026-08-03 00:00 |
07:40:26.09 |
+17:28:59.1 |
HIP 37453 |
14.16 |
| 2026-08-03 12:00 |
07:41:07.46 |
+17:27:55.3 |
HIP 37453 |
6.46 |
| 2026-08-04 00:00 |
07:41:48.82 |
+17:26:50.8 |
HIP 37453 |
8.95 |
| 2026-08-04 12:00 |
07:42:30.16 |
+17:25:45.7 |
HIP 37591 |
4.47 |
| 2026-08-05 00:00 |
07:43:11.48 |
+17:24:39.8 |
HIP 37591 |
5.46 |
| 2026-08-05 12:00 |
07:43:52.79 |
+17:23:33.4 |
HIP 37759 |
11.72 |
| 2026-08-06 00:00 |
07:44:34.07 |
+17:22:26.2 |
HIP 37759 |
6.25 |
| 2026-08-06 12:00 |
07:45:15.34 |
+17:21:18.4 |
HIP 37759 |
11.72 |
| 2026-08-07 00:00 |
07:45:56.58 |
+17:20:10.0 |
HIP 37922 |
19.88 |
| 2026-08-07 12:00 |
07:46:37.81 |
+17:19:00.8 |
HIP 38009 |
12.35 |
| 2026-08-08 00:00 |
07:47:19.01 |
+17:17:51.1 |
HIP 38009 |
4.62 |
| 2026-08-08 12:00 |
07:48:00.19 |
+17:16:40.7 |
HIP 38009 |
9.28 |
| 2026-08-09 00:00 |
07:48:41.34 |
+17:15:29.7 |
HIP 38009 |
18.62 |
| 2026-08-09 12:00 |
07:49:22.48 |
+17:14:18.0 |
HIP 38270 |
20.99 |
| 2026-08-10 00:00 |
07:50:03.59 |
+17:13:05.7 |
HIP 38270 |
16.43 |
| 2026-08-10 12:00 |
07:50:44.67 |
+17:11:52.8 |
HIP 38270 |
17.17 |
| 2026-08-11 00:00 |
07:51:25.73 |
+17:10:39.3 |
HIP 38281 |
21.51 |
| 2026-08-11 12:00 |
07:52:06.76 |
+17:09:25.1 |
HIP 38533 |
26.59 |
| 2026-08-12 00:00 |
07:52:47.76 |
+17:08:10.4 |
HIP 38533 |
19.66 |
| 2026-08-12 12:00 |
07:53:28.73 |
+17:06:55.0 |
HIP 38533 |
16.17 |
| 2026-08-13 00:00 |
07:54:09.68 |
+17:05:39.0 |
HIP 38533 |
18.19 |
| 2026-08-13 12:00 |
07:54:50.60 |
+17:04:22.5 |
HIP 38533 |
24.39 |
| 2026-08-14 00:00 |
07:55:31.48 |
+17:03:05.4 |
HIP 38533 |
32.45 |
| 2026-08-14 12:00 |
07:56:12.34 |
+17:01:47.6 |
HIP 38533 |
41.29 |
| 2026-08-15 00:00 |
07:56:53.16 |
+17:00:29.3 |
HIP 39046 |
36.39 |
| 2026-08-15 12:00 |
07:57:33.95 |
+16:59:10.5 |
HIP 39046 |
26.77 |
| 2026-08-16 00:00 |
07:58:14.71 |
+16:57:51.0 |
HIP 39046 |
17.41 |
| 2026-08-16 12:00 |
07:58:55.43 |
+16:56:31.0 |
HIP 39046 |
9.10 |
| 2026-08-17 00:00 |
07:59:36.12 |
+16:55:10.5 |
HIP 39046 |
7.46 |
| 2026-08-17 12:00 |
08:00:16.77 |
+16:53:49.4 |
HIP 39046 |
14.88 |
| 2026-08-18 00:00 |
08:00:57.39 |
+16:52:27.7 |
HIP 39226 |
7.63 |
| 2026-08-18 12:00 |
08:01:37.97 |
+16:51:05.5 |
HIP 39226 |
6.86 |
| 2026-08-19 00:00 |
08:02:18.52 |
+16:49:42.8 |
HIP 39228 |
15.04 |