메타데이터
| 항목 |
값 |
| Designation |
402P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-12-09T19:06:20.517120Z |
| Orbit solution date (soln_date, UTC) |
2024-06-14T15:42:24Z |
| Obs used |
2125 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
14.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-02-22.0000000 |
| e |
0.43884048 |
| q (au) |
3.916205 |
| a (au) |
6.978773 |
| i (deg) |
30.894646 |
| Ω (om, deg) |
123.131904 |
| ω (w, deg) |
326.984530 |
| M (ma, deg) |
188.241334 |
밝기
산란 + 전체 선형
$$
M_a = (4.541 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.541 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.976 |
| k |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2020-08-24 |
2021-12-09 |
+8.2871 |
-5.052 |
| 2021-12-11 |
2024-06-10 |
+1.5638 |
-1.208 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
15:12:30.31 |
+17:26:56.8 |
HIP 74300 |
18.88 |
| 2026-06-01 12:00 |
15:12:19.85 |
+17:26:30.7 |
HIP 74300 |
16.35 |
| 2026-06-02 00:00 |
15:12:09.45 |
+17:26:03.4 |
HIP 74300 |
13.82 |
| 2026-06-02 12:00 |
15:11:59.12 |
+17:25:34.8 |
HIP 74300 |
11.31 |
| 2026-06-03 00:00 |
15:11:48.84 |
+17:25:04.9 |
HIP 74300 |
8.81 |
| 2026-06-03 12:00 |
15:11:38.63 |
+17:24:33.9 |
HIP 74300 |
6.32 |
| 2026-06-04 00:00 |
15:11:28.48 |
+17:24:01.6 |
HIP 74300 |
3.85 |
| 2026-06-04 12:00 |
15:11:18.40 |
+17:23:28.1 |
HIP 74300 |
1.40 |
| 2026-06-05 00:00 |
15:11:08.39 |
+17:22:53.3 |
HIP 74300 |
1.15 |
| 2026-06-05 12:00 |
15:10:58.44 |
+17:22:17.4 |
HIP 74300 |
3.56 |
| 2026-06-06 00:00 |
15:10:48.56 |
+17:21:40.2 |
HIP 74300 |
5.99 |
| 2026-06-06 12:00 |
15:10:38.76 |
+17:21:01.8 |
HIP 74300 |
8.42 |
| 2026-06-07 00:00 |
15:10:29.02 |
+17:20:22.3 |
HIP 74300 |
10.83 |
| 2026-06-07 12:00 |
15:10:19.36 |
+17:19:41.5 |
HIP 74300 |
13.24 |
| 2026-06-08 00:00 |
15:10:09.77 |
+17:18:59.5 |
HIP 74300 |
15.63 |
| 2026-06-08 12:00 |
15:10:00.26 |
+17:18:16.3 |
HIP 74300 |
18.01 |
| 2026-06-09 00:00 |
15:09:50.82 |
+17:17:32.0 |
HIP 74300 |
20.38 |
| 2026-06-09 12:00 |
15:09:41.46 |
+17:16:46.5 |
HIP 74300 |
22.74 |
| 2026-06-10 00:00 |
15:09:32.18 |
+17:15:59.7 |
HIP 74300 |
25.09 |
| 2026-06-10 12:00 |
15:09:22.98 |
+17:15:11.9 |
HIP 74028 |
24.29 |
| 2026-06-11 00:00 |
15:09:13.86 |
+17:14:22.8 |
HIP 74028 |
22.07 |
| 2026-06-11 12:00 |
15:09:04.82 |
+17:13:32.6 |
HIP 74028 |
19.91 |
| 2026-06-12 00:00 |
15:08:55.86 |
+17:12:41.2 |
HIP 74028 |
17.80 |
| 2026-06-12 12:00 |
15:08:46.98 |
+17:11:48.7 |
HIP 74028 |
15.76 |
| 2026-06-13 00:00 |
15:08:38.19 |
+17:10:55.0 |
HIP 74028 |
13.84 |
| 2026-06-13 12:00 |
15:08:29.49 |
+17:10:00.2 |
HIP 74028 |
12.06 |
| 2026-06-14 00:00 |
15:08:20.87 |
+17:09:04.2 |
HIP 74028 |
10.50 |
| 2026-06-14 12:00 |
15:08:12.34 |
+17:08:07.1 |
HIP 74028 |
9.26 |
| 2026-06-15 00:00 |
15:08:03.89 |
+17:07:08.9 |
HIP 74028 |
8.48 |
| 2026-06-15 12:00 |
15:07:55.54 |
+17:06:09.6 |
HIP 74028 |
8.28 |
| 2026-06-16 00:00 |
15:07:47.28 |
+17:05:09.1 |
HIP 74028 |
8.68 |
| 2026-06-16 12:00 |
15:07:39.11 |
+17:04:07.6 |
HIP 74028 |
9.61 |
| 2026-06-17 00:00 |
15:07:31.03 |
+17:03:05.0 |
HIP 74028 |
10.93 |
| 2026-06-17 12:00 |
15:07:23.04 |
+17:02:01.2 |
HIP 74028 |
12.50 |
| 2026-06-18 00:00 |
15:07:15.15 |
+17:00:56.4 |
HIP 74028 |
14.24 |
| 2026-06-18 12:00 |
15:07:07.35 |
+16:59:50.6 |
HIP 74028 |
16.09 |
| 2026-06-19 00:00 |
15:06:59.65 |
+16:58:43.6 |
HIP 74028 |
18.02 |
| 2026-06-19 12:00 |
15:06:52.05 |
+16:57:35.6 |
HIP 74028 |
19.99 |
| 2026-06-20 00:00 |
15:06:44.54 |
+16:56:26.6 |
HIP 74028 |
21.99 |
| 2026-06-20 12:00 |
15:06:37.13 |
+16:55:16.5 |
HIP 74028 |
24.01 |
| 2026-06-21 00:00 |
15:06:29.82 |
+16:54:05.4 |
HIP 74028 |
26.05 |
| 2026-06-21 12:00 |
15:06:22.61 |
+16:52:53.3 |
HIP 74028 |
28.09 |
| 2026-06-22 00:00 |
15:06:15.49 |
+16:51:40.2 |
HIP 74028 |
30.14 |