메타데이터
| 항목 |
값 |
| Designation |
C/2007 G1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-11-16T10:11:22.225920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:06Z |
| Obs used |
2001 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-01-11.0000000 |
| e |
1.00150564 |
| q (au) |
2.646214 |
| a (au) |
-1757.531288 |
| i (deg) |
88.358397 |
| Ω (om, deg) |
78.992256 |
| ω (w, deg) |
224.020457 |
| M (ma, deg) |
-0.004152 |
밝기
산란 + 전체 선형
$$
M_a = (12.690 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.690 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.732 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2007-04-10 |
2007-09-17 |
+9.3628 |
-7.135 |
| 2007-09-17 |
2008-07-04 |
-5.1279 |
+3.059 |
| 2008-07-04 |
2008-10-24 |
+29.8517 |
-13.922 |
| 2009-01-03 |
2011-02-06 |
+1.0903 |
-0.233 |
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 |
05:07:53.30 |
+34:50:16.7 |
HIP 23998 |
20.55 |
| 2026-06-01 12:00 |
05:07:57.13 |
+34:50:22.6 |
HIP 23998 |
19.76 |
| 2026-06-02 00:00 |
05:08:00.96 |
+34:50:28.7 |
HIP 23998 |
18.97 |
| 2026-06-02 12:00 |
05:08:04.79 |
+34:50:34.8 |
HIP 23998 |
18.17 |
| 2026-06-03 00:00 |
05:08:08.63 |
+34:50:41.0 |
HIP 23998 |
17.38 |
| 2026-06-03 12:00 |
05:08:12.47 |
+34:50:47.3 |
HIP 23998 |
16.59 |
| 2026-06-04 00:00 |
05:08:16.32 |
+34:50:53.7 |
HIP 23998 |
15.79 |
| 2026-06-04 12:00 |
05:08:20.17 |
+34:51:00.2 |
HIP 23998 |
15.00 |
| 2026-06-05 00:00 |
05:08:24.02 |
+34:51:06.7 |
HIP 23998 |
14.20 |
| 2026-06-05 12:00 |
05:08:27.87 |
+34:51:13.3 |
HIP 23998 |
13.41 |
| 2026-06-06 00:00 |
05:08:31.72 |
+34:51:20.0 |
HIP 23998 |
12.61 |
| 2026-06-06 12:00 |
05:08:35.58 |
+34:51:26.7 |
HIP 23998 |
11.82 |
| 2026-06-07 00:00 |
05:08:39.43 |
+34:51:33.6 |
HIP 23998 |
11.02 |
| 2026-06-07 12:00 |
05:08:43.29 |
+34:51:40.5 |
HIP 23998 |
10.22 |
| 2026-06-08 00:00 |
05:08:47.15 |
+34:51:47.5 |
HIP 23998 |
9.43 |
| 2026-06-08 12:00 |
05:08:51.01 |
+34:51:54.5 |
HIP 23998 |
8.64 |
| 2026-06-09 00:00 |
05:08:54.87 |
+34:52:01.7 |
HIP 23998 |
7.84 |
| 2026-06-09 12:00 |
05:08:58.72 |
+34:52:08.9 |
HIP 23998 |
7.05 |
| 2026-06-10 00:00 |
05:09:02.58 |
+34:52:16.2 |
HIP 23998 |
6.26 |
| 2026-06-10 12:00 |
05:09:06.44 |
+34:52:23.6 |
HIP 23998 |
5.48 |
| 2026-06-11 00:00 |
05:09:10.30 |
+34:52:31.0 |
HIP 23998 |
4.70 |
| 2026-06-11 12:00 |
05:09:14.16 |
+34:52:38.5 |
HIP 23998 |
3.93 |
| 2026-06-12 00:00 |
05:09:18.01 |
+34:52:46.1 |
HIP 23998 |
3.18 |
| 2026-06-12 12:00 |
05:09:21.87 |
+34:52:53.8 |
HIP 23998 |
2.46 |
| 2026-06-13 00:00 |
05:09:25.72 |
+34:53:01.5 |
HIP 23998 |
1.81 |
| 2026-06-13 12:00 |
05:09:29.57 |
+34:53:09.4 |
HIP 23998 |
1.33 |
| 2026-06-14 00:00 |
05:09:33.42 |
+34:53:17.3 |
HIP 23998 |
1.25 |
| 2026-06-14 12:00 |
05:09:37.27 |
+34:53:25.2 |
HIP 23998 |
1.63 |
| 2026-06-15 00:00 |
05:09:41.11 |
+34:53:33.3 |
HIP 23998 |
2.24 |
| 2026-06-15 12:00 |
05:09:44.95 |
+34:53:41.4 |
HIP 23998 |
2.94 |
| 2026-06-16 00:00 |
05:09:48.79 |
+34:53:49.5 |
HIP 23998 |
3.68 |
| 2026-06-16 12:00 |
05:09:52.63 |
+34:53:57.8 |
HIP 23998 |
4.44 |
| 2026-06-17 00:00 |
05:09:56.46 |
+34:54:06.1 |
HIP 23998 |
5.22 |
| 2026-06-17 12:00 |
05:10:00.28 |
+34:54:14.5 |
HIP 23998 |
5.99 |
| 2026-06-18 00:00 |
05:10:04.10 |
+34:54:23.0 |
HIP 23998 |
6.78 |
| 2026-06-18 12:00 |
05:10:07.92 |
+34:54:31.5 |
HIP 23998 |
7.56 |
| 2026-06-19 00:00 |
05:10:11.73 |
+34:54:40.1 |
HIP 23998 |
8.35 |
| 2026-06-19 12:00 |
05:10:15.54 |
+34:54:48.8 |
HIP 23998 |
9.14 |
| 2026-06-20 00:00 |
05:10:19.34 |
+34:54:57.6 |
HIP 23998 |
9.92 |
| 2026-06-20 12:00 |
05:10:23.14 |
+34:55:06.4 |
HIP 23998 |
10.71 |
| 2026-06-21 00:00 |
05:10:26.93 |
+34:55:15.3 |
HIP 23998 |
11.50 |
| 2026-06-21 12:00 |
05:10:30.71 |
+34:55:24.2 |
HIP 23998 |
12.28 |
| 2026-06-22 00:00 |
05:10:34.49 |
+34:55:33.3 |
HIP 23998 |
13.07 |